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LESSON 3.1 Converting Between Measurement Systems How can you use ratios and proportions to convert measurements? ADDITIONAL EXAMPLE 1 While making soup, Jenna added 148 milliliters of broth. About how many fluid ounces does she add to her soup? Jenna adds about 5 fluid ounces to her soup. ADDITIONAL EXAMPLE 2 Wren’s bedroom is 12 feet long × 10 feet wide. She plans to purchase carpet for the entire room. The carpet costs $25 per square meter. What will be the total cost of the new carpet to the nearest cent? $279.08 3.1 LESSON QUIZ 7.4.E 1. Mindy’s paper cup holds 6 fluid ounces. How many milliliters is this? Complete the diagram to solve the problem. 177.6 milliliters Tell which measure is greater. 2. twenty ounces or twenty grams twenty ounces 3. 60 gallons or 60 liters 60 gallons 4. A bag of potatoes weighs 15 pounds. How many kilograms is 6.81 this?kg 5. You want to measure the length of a ribbon in inches. You only have a centimeter ruler. The length of the ribbon is 16 cm. Is the ribbon longer or shorter than 16 inches? How many inches long is it? shorter than 16 inches; about 6.3 inches How can you use ratios and proportions to convert measurements? Sample answer: Use a table of equivalent measures to set up a conversion factor, and multiply by it to convert one unit to another.