Solving Proportions

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# Solving Proportions - PowerPoint PPT Presentation

Solving Proportions. Section 5.2. Objectives. Determine whether a proportion is true or false Solve a proportion. Objective 1: Determine whether a proportion is true or false. Objective 1. Proportions states two ratios are equal

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## PowerPoint Slideshow about 'Solving Proportions' - gagan

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Presentation Transcript

### Solving Proportions

Section 5.2

Objectives
• Determine whether a proportion is true or false
• Solve a proportion

### Objective 1: Determine whether a proportion is true or false

Objective 1
• Proportions states two ratios are equal
• Cross multiplication – checks whether proportion is true or false
• Cross multiplication is shortcut for converting both fractions to have common denominator and checking that numerators match
Objective 1
• To check whether proportion is true or false
• Check that ratios or rates have same units
• Cross multiply
• If cross products are equal, proportion is true

### Objective 2:Solve a proportion

Objective 2
• If three numbers of proportion are given, you can find the fourth
• To solve a proportion
• Cross multiply
• Do related division to find missing number