Finding the Fourth Proportional to 708.48, 1,062.72 and 480
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Solution
The fourth proportional to 708.48, 1,062.72 and 480 is: 720
Step by Step Solution
- Step 1: Write the proportion equation
708.48 : 1,062.72 = 480 : x - Step 2: Convert to fraction form
708.48/1,062.72 = 480/x - Step 3: Cross multiply
708.48x = 1,062.72 × 480 - Step 4: Simplify right side
708.48x = 510,105.60 - Step 5: Solve for x
x = 510,105.60/708.48 - Step 6: Final answer
x = 720
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.