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Finding the Fourth Proportional to 715,224.69, 987,005.92 and 392,927.85

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Solution

The fourth proportional to 715,224.69, 987,005.92 and 392,927.85 is: 542,238.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,224.69 : 987,005.92 = 392,927.85 : x
  2. Step 2: Convert to fraction form
    715,224.69/987,005.92 = 392,927.85/x
  3. Step 3: Cross multiply
    715,224.69x = 987,005.92 × 392,927.85
  4. Step 4: Simplify right side
    715,224.69x = 387,822,114,082.87
  5. Step 5: Solve for x
    x = 387,822,114,082.87/715,224.69
  6. Step 6: Final answer
    x = 542,238.15

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1.5x scale

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.