Chapter 4.1 Ratio and Proportion
Example 1- Using Unit Rate!
Ratio-comparison of two numbers by division
a/b a:b a to b
Use simplest form!
ex. 12/3 = 4/1
Rate- quantities are measured in different units
Unit rate- denominator is 1
Example 2- Converting Rates!
ex. convert to feet/minutes
24 inches in 180 seconds
Cross Multiply and Divide Common Units
Example 3- Multiplication Property of Equality!
Proportion- Two equal ratios
Multiply by the least common multiple
ex.
Example 4- Using Cross Products!
To solve a proportion cross multiply.
(a*d and b*c)
ex.
(a*8 and 12*4)
Example 5- Multi-Step Proportions!
ex.
Use Distributive Property.
Solve like a regular Multi-Step Equation.
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