Finding the Fourth Proportional to 715,691.79, 987,643.56 and 393,394.95
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Solution
The fourth proportional to 715,691.79, 987,643.56 and 393,394.95 is: 542,878.92
Step by Step Solution
- Step 1: Write the proportion equation
715,691.79 : 987,643.56 = 393,394.95 : x - Step 2: Convert to fraction form
715,691.79/987,643.56 = 393,394.95/x - Step 3: Cross multiply
715,691.79x = 987,643.56 × 393,394.95 - Step 4: Simplify right side
715,691.79x = 388,533,988,904.02 - Step 5: Solve for x
x = 388,533,988,904.02/715,691.79 - Step 6: Final answer
x = 542,878.92
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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.