Finding the Fourth Proportional to 481, 721.62 and 139
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Solution
The fourth proportional to 481, 721.62 and 139 is: 208.53
Step by Step Solution
- Step 1: Write the proportion equation
481 : 721.62 = 139 : x - Step 2: Convert to fraction form
481/721.62 = 139/x - Step 3: Cross multiply
481x = 721.62 × 139 - Step 4: Simplify right side
481x = 100,305.18 - Step 5: Solve for x
x = 100,305.18/481 - Step 6: Final answer
x = 208.53
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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.