The document provides examples of using proportions to solve various math problems involving ratios, fractions, rates, and geometric similarities. It includes word problems about book sales, fertilizer amounts, heights and shadows, and finding missing values in proportions. The examples demonstrate setting up and solving proportions to find unknown quantities.

1. Warm Up Write in simplest form Solve.

2. Warm Up Write in simplest form Solve. 1

3. Proportions Some of the most useful items on the math menu Chapter 4.1

4. Write 5 to 9 as a fraction as a ratio What’s the difference?

5. Are They Equal? Cross Multiplication What is 10 x 5? What is 2 x 25? If both cross multiplications statements are equal, the fractions are equal.

6. Are They Equal? Cross Multiplication What is 16 x 3? What is 4 x 12? If both cross multiplications statements are equal, the fractions are equal. 48 48

7. Are They Equal? Cross Multiplication What is 3 x 60? What is 4 x 48?

8. Find the missing number. Using Algebra 14 x 35 = 10x

9. Rectangle ABCD ~ WXYZ Solve for s. B W D C A X Y Z 9 27 s 25 25 s

10. Book Sale 4 for $1.25 How much is one? Label books and price Set up a proportion. Write down labels to help.

11. Cross Multiply and divide 4 for $1.25 How much for one?

12. How Tall? Man – 6 ft Man’s shadow – 9 ft Tree’s shadow – 45 ft Set up a proportion.

13. Proportion Man – 6 ft Man’s shadow – 9 ft Tree’s shadow – 45 ft Labels Actual Height shadow length

14. “Lush-Lawn Fertilizer” Use 4 lb. for 1500 sq. ft. How much to cover 2400 ft 2 ? Labels:

15. “Lush-Lawn Fertilizer”

16. Assignment Page 168 : 13-45 odds