Finding the Fourth Proportional to 390,818.92, 586,122.91 and 138,066.13
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Solution
The fourth proportional to 390,818.92, 586,122.91 and 138,066.13 is: 207,061.94
Step by Step Solution
- Step 1: Write the proportion equation
390,818.92 : 586,122.91 = 138,066.13 : x - Step 2: Convert to fraction form
390,818.92/586,122.91 = 138,066.13/x - Step 3: Cross multiply
390,818.92x = 586,122.91 × 138,066.13 - Step 4: Simplify right side
390,818.92x = 80,923,721,888.04 - Step 5: Solve for x
x = 80,923,721,888.04/390,818.92 - Step 6: Final answer
x = 207,061.94
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.