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Finding the Fourth Proportional to 709,414.80, 979,013.24 and 387,145.71

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Solution

The fourth proportional to 709,414.80, 979,013.24 and 387,145.71 is: 534,272.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,414.80 : 979,013.24 = 387,145.71 : x
  2. Step 2: Convert to fraction form
    709,414.80/979,013.24 = 387,145.71/x
  3. Step 3: Cross multiply
    709,414.80x = 979,013.24 × 387,145.71
  4. Step 4: Simplify right side
    709,414.80x = 379,020,773,963.47
  5. Step 5: Solve for x
    x = 379,020,773,963.47/709,414.80
  6. Step 6: Final answer
    x = 534,272.44

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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.