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Finding the Fourth Proportional to 709,906.92, 979,691.72 and 387,637.44

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Solution

The fourth proportional to 709,906.92, 979,691.72 and 387,637.44 is: 534,950.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,906.92 : 979,691.72 = 387,637.44 : x
  2. Step 2: Convert to fraction form
    709,906.92/979,691.72 = 387,637.44/x
  3. Step 3: Cross multiply
    709,906.92x = 979,691.72 × 387,637.44
  4. Step 4: Simplify right side
    709,906.92x = 379,765,190,330.00
  5. Step 5: Solve for x
    x = 379,765,190,330.00/709,906.92
  6. Step 6: Final answer
    x = 534,950.68

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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.