1. Section 4-4 p. 170 Goal – to use proportions to solve problems

2. Proportion A proportion is an equation stating that two ratios are equivalent or equal.

3. Proportion A nutrition label!

4. Proportion In algebra:

5. Properties of Proportions Cross products are equal.

6. Together: Do these ratios form a proportion?

7. Together: Solve the proportion.

8. Together: 4 out of every 5 people are right-handed. If we have 24 people, how many people do you expect to be right-handed?

9. Together: These two triangles are proportional. Find the lengths of the legs on the larger triangle.

10. Students Do these ratios form a proportion?

11. Students: Solve the proportion.

12. Homework: p. 172 12-36 even