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# ZingPath: Setting Up Equations and Formulas

## Proportion and Its Properties                      Searching for

## Setting Up Equations and Formulas

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### Lesson Focus

#### Proportion and Its Properties

Algebra-1

You will determine if two ratios form a proportion and solve for the unknown value of a proportion.

### Now You Know

After completing this tutorial, you will be able to complete the following:

• Determine if two ratios form a proportion.
• Determine if a given relationship is proportional.
• Use the properties of proportions to solve problems involving proportional relationships.
• Solve for the unknown value of a proportion in mathematical statements and real-life situations.

### Everything You'll Have Covered  The quantities b and c are called the means, whereas the quantities a and d are called the extremes. Simple arithmetic yields the means-extremes, or cross-product, property of proportions. The majority of proportional reasoning problems can be solved by using some variation of this property.

### Tutorial Details

 Approximate Time 40 Minutes Pre-requisite Concepts Students should know how to apply the concept of division and evaluate expressions using operations with fractions. Course Algebra-1 Type of Tutorial Concept Development Key Vocabulary cross-product, extremes switching property, means switching property