Finding the Fourth Proportional to 718,463.60, 991,486.68 and 396,185.12
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Solution
The fourth proportional to 718,463.60, 991,486.68 and 396,185.12 is: 546,739.28
Step by Step Solution
- Step 1: Write the proportion equation
718,463.60 : 991,486.68 = 396,185.12 : x - Step 2: Convert to fraction form
718,463.60/991,486.68 = 396,185.12/x - Step 3: Cross multiply
718,463.60x = 991,486.68 × 396,185.12 - Step 4: Simplify right side
718,463.60x = 392,812,269,294.20 - Step 5: Solve for x
x = 392,812,269,294.20/718,463.60 - Step 6: Final answer
x = 546,739.28
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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.