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Finding the Fourth Proportional to 709,448, 979,058.88 and 387,178.87

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Solution

The fourth proportional to 709,448, 979,058.88 and 387,178.87 is: 534,318.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,448 : 979,058.88 = 387,178.87 : x
  2. Step 2: Convert to fraction form
    709,448/979,058.88 = 387,178.87/x
  3. Step 3: Cross multiply
    709,448x = 979,058.88 × 387,178.87
  4. Step 4: Simplify right side
    709,448x = 379,070,905,926.57
  5. Step 5: Solve for x
    x = 379,070,905,926.57/709,448
  6. Step 6: Final answer
    x = 534,318.10

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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.