Section 6.3 1

When two pairs of numbers such as (3, 2 and 6, 4) have the same ratio, we say that they are proportional.

The equation states that the pairs 3, 2 and 6, 4

are proportional. Such an equation is called a proportion.

3 6

2 4

Section 6.3 2

Section 6.3 3

Solving Proportions

To solve equate cross products and then divide on both sides to get x alone.

x c

a d

Solve: Write a mixed numeral for the answer.6

8 5

x

Section 6.3 4

Homework:Problems 23, 45, 43, 53, 57 – solve each equation top/down as demonstrated in class.