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ZingPath: Setting Up Equations and Formulas

Proportion and Its Properties

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Lesson Focus

Proportion and Its Properties


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

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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