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Finding the Fourth Proportional to 709,894.52, 979,694.15 and 387,634.60

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Solution

The fourth proportional to 709,894.52, 979,694.15 and 387,634.60 is: 534,957.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,894.52 : 979,694.15 = 387,634.60 : x
  2. Step 2: Convert to fraction form
    709,894.52/979,694.15 = 387,634.60/x
  3. Step 3: Cross multiply
    709,894.52x = 979,694.15 × 387,634.60
  4. Step 4: Simplify right side
    709,894.52x = 379,763,349,957.59
  5. Step 5: Solve for x
    x = 379,763,349,957.59/709,894.52
  6. Step 6: Final answer
    x = 534,957.43

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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.