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Algebra-1

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

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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.

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.

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 |