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Finding the Fourth Proportional to 715,073.04, 986,806.67 and 392,790.33

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Solution

The fourth proportional to 715,073.04, 986,806.67 and 392,790.33 is: 542,053.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,073.04 : 986,806.67 = 392,790.33 : x
  2. Step 2: Convert to fraction form
    715,073.04/986,806.67 = 392,790.33/x
  3. Step 3: Cross multiply
    715,073.04x = 986,806.67 × 392,790.33
  4. Step 4: Simplify right side
    715,073.04x = 387,608,115,591.55
  5. Step 5: Solve for x
    x = 387,608,115,591.55/715,073.04
  6. Step 6: Final answer
    x = 542,053.88

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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.