Ch 4: ORELA Math: Ratios & Proportions

About This Chapter

These quick, entertaining videos cover ratios and proportions to help you prepare for your ORELA Math assessment. If you have any questions as you work through the chapter, be sure to ask our instructors for assistance.

ORELA Math: Ratios & Proportions - Chapter Summary

If you need help studying ratios and proportions for your ORELA Math certification exam, you've come to the right place. These short video lessons break down the concepts you need to know, making them easy to understand. Topics include:

  • How to determine constant and average rates
  • Definition and applications of proportion
  • Making calculations with ratios and proportions
  • Scale factors for perimeter, area and volume of figures

Each video is followed by a companion transcript that highlights key ideas and provides a great resource for additional review. Let our instructors know if you have any questions about the ratios and proportions ideas presented in this chapter.

Objectives of the ORELA Math: Ratios & Proportions Chapter

This chapter offers a number of resources designed to help you master the ratios and proportions topics you'll likely encounter under the measurement and geometry portion of your ORELA certification assessment, which is 19% of your grade. The remainder of the test is devoted to the following content areas: math processes and number sense (19%); patterns, algebra and functions (24%); trig and calculus (19%); and stats, probability and discrete mathematics (19%).

The computer-administered assessment allows you four hours and fifteen minutes to work through all 150 multiple-choice questions. The lesson quizzes in this chapter mimic the ORELA multiple-choice style so you can get comfortable with the test format and assess your test-taking pace before your exam date.

5 Lessons in Chapter 4: ORELA Math: Ratios & Proportions
Test your knowledge with a 30-question chapter practice test
Ratios & Rates: Definitions & Examples

1. Ratios & Rates: Definitions & Examples

If we have two items, or two numbers, and we want to compare them, what language can we use? How do we write the comparison? Find out as we learn about ratios and rates in this lesson.

Finding Constant and Average Rates

2. Finding Constant and Average Rates

Watch this video lesson to learn the differences between constant and average rates. You will learn the steps you need to take to find them and get two great visuals you can keep in mind to help you solve these rate problems.

Proportion: Definition, Application & Examples

3. Proportion: Definition, Application & Examples

When we want to compare one ratio, or fraction, to another equivalent ratio, it's a proportion. Learn all about proportions and practice solving proportion problems in this lesson.

Calculations with Ratios and Proportions

4. Calculations with Ratios and Proportions

Even if only 99 out of 100 people need to know how to work with ratios, the odds that they'll be useful to you are very high. In this lesson, we'll practice performing calculations with ratios and proportions.

Applying Scale Factors to Perimeter, Area, and Volume of Similar Figures

5. Applying Scale Factors to Perimeter, Area, and Volume of Similar Figures

How do shapes change sizes yet retain their proportions and similarities to other shapes? In this lesson, we'll look at what a scale factor is and how to apply it. We'll consider scale factors with regards to three different aspects of similar shapes: perimeter, area and volume.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
Not Taken
Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
Not Taken

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Other Chapters

Other chapters within the ORELA Mathematics: Practice & Study Guide course