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Finding the Fourth Proportional to 431,844.60, 647,710.20 and 132,355.20

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Solution

The fourth proportional to 431,844.60, 647,710.20 and 132,355.20 is: 198,515.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,844.60 : 647,710.20 = 132,355.20 : x
  2. Step 2: Convert to fraction form
    431,844.60/647,710.20 = 132,355.20/x
  3. Step 3: Cross multiply
    431,844.60x = 647,710.20 × 132,355.20
  4. Step 4: Simplify right side
    431,844.60x = 85,727,813,063.04
  5. Step 5: Solve for x
    x = 85,727,813,063.04/431,844.60
  6. Step 6: Final answer
    x = 198,515.42

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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.