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Finding the Fourth Proportional to 978,344.60, 1,467,516.90 and 418,472.60

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Solution

The fourth proportional to 978,344.60, 1,467,516.90 and 418,472.60 is: 627,708.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,344.60 : 1,467,516.90 = 418,472.60 : x
  2. Step 2: Convert to fraction form
    978,344.60/1,467,516.90 = 418,472.60/x
  3. Step 3: Cross multiply
    978,344.60x = 1,467,516.90 × 418,472.60
  4. Step 4: Simplify right side
    978,344.60x = 614,115,612,686.94
  5. Step 5: Solve for x
    x = 614,115,612,686.94/978,344.60
  6. Step 6: Final answer
    x = 627,708.90

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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.