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Finding the Fourth Proportional to 625,981.92, 938,657.13 and 445,964.49

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Solution

The fourth proportional to 625,981.92, 938,657.13 and 445,964.49 is: 668,721.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,981.92 : 938,657.13 = 445,964.49 : x
  2. Step 2: Convert to fraction form
    625,981.92/938,657.13 = 445,964.49/x
  3. Step 3: Cross multiply
    625,981.92x = 938,657.13 × 445,964.49
  4. Step 4: Simplify right side
    625,981.92x = 418,607,748,265.31
  5. Step 5: Solve for x
    x = 418,607,748,265.31/625,981.92
  6. Step 6: Final answer
    x = 668,721.79

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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.