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Finding the Fourth Proportional to 394,992.78, 592,550.58 and 128,691.24

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Solution

The fourth proportional to 394,992.78, 592,550.58 and 128,691.24 is: 193,056.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,992.78 : 592,550.58 = 128,691.24 : x
  2. Step 2: Convert to fraction form
    394,992.78/592,550.58 = 128,691.24/x
  3. Step 3: Cross multiply
    394,992.78x = 592,550.58 × 128,691.24
  4. Step 4: Simplify right side
    394,992.78x = 76,256,068,902.92
  5. Step 5: Solve for x
    x = 76,256,068,902.92/394,992.78
  6. Step 6: Final answer
    x = 193,056.87

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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.