1. Wednesday Warm Up

2. Applications of Proportions Objective: By the end of today’s lesson, you will be able to solve proportions and use proportions to solve various real world problems

3. Applications of Proportions Example 1: A canary’s heart beats 200 times in 12 seconds. How many times does its heart beat in 42 seconds?

4. Applications of Proportions

5. Example 2: Suppose you travel 66 kilometers in 1.25 hours. Moving at the same speed, how many kilometers would you cover in 2 hours?

6. Applications of Proportions

7. Example 3: If it takes you 21 minutes to ride your bike 5 miles, how long will it take you, in minutes and seconds, to go 12 miles?

8. Applications of Proportions

9. Example 4: The ratio of two numbers is 4:3. Their sum is 70. What are the numbers?

10. Applications of Proportions The two numbers are 40 and 30.

11. Applications of Proportions Example 5: 5 out of 8 students at East High School are girls. If East High has 351 boys, how many girls are there?

12. Applications of Proportions

13. Example 6: 5 out of 8 students at East High School are girls. If East High has 252 more girls than boys, how many girls are there? Hint: Let x = # of boys

14. Applications of Proportions There are 378 boys and 630 girls.

15. Homework Work on the applications of proportions worksheet.