Finding the Fourth Proportional to 715,598.40, 987,543.96 and 393,316.68
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Solution
The fourth proportional to 715,598.40, 987,543.96 and 393,316.68 is: 542,787.00
Step by Step Solution
- Step 1: Write the proportion equation
715,598.40 : 987,543.96 = 393,316.68 : x - Step 2: Convert to fraction form
715,598.40/987,543.96 = 393,316.68/x - Step 3: Cross multiply
715,598.40x = 987,543.96 × 393,316.68 - Step 4: Simplify right side
715,598.40x = 388,417,511,701.25 - Step 5: Solve for x
x = 388,417,511,701.25/715,598.40 - Step 6: Final answer
x = 542,787.00
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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.