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Finding the Fourth Proportional to 394,937.52, 592,293.12 and 128,721.30

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Solution

The fourth proportional to 394,937.52, 592,293.12 and 128,721.30 is: 193,045.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,937.52 : 592,293.12 = 128,721.30 : x
  2. Step 2: Convert to fraction form
    394,937.52/592,293.12 = 128,721.30/x
  3. Step 3: Cross multiply
    394,937.52x = 592,293.12 × 128,721.30
  4. Step 4: Simplify right side
    394,937.52x = 76,240,740,387.46
  5. Step 5: Solve for x
    x = 76,240,740,387.46/394,937.52
  6. Step 6: Final answer
    x = 193,045.07

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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.