Finding the Fourth Proportional to 636,387.28, 878,348.01 and 403,663.75
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Solution
The fourth proportional to 636,387.28, 878,348.01 and 403,663.75 is: 557,140.70
Step by Step Solution
- Step 1: Write the proportion equation
636,387.28 : 878,348.01 = 403,663.75 : x - Step 2: Convert to fraction form
636,387.28/878,348.01 = 403,663.75/x - Step 3: Cross multiply
636,387.28x = 878,348.01 × 403,663.75 - Step 4: Simplify right side
636,387.28x = 354,557,251,521.64 - Step 5: Solve for x
x = 354,557,251,521.64/636,387.28 - Step 6: Final answer
x = 557,140.70
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.