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Finding the Fourth Proportional to 431,624.70, 647,485.65 and 132,102.90

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Solution

The fourth proportional to 431,624.70, 647,485.65 and 132,102.90 is: 198,169.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,624.70 : 647,485.65 = 132,102.90 : x
  2. Step 2: Convert to fraction form
    431,624.70/647,485.65 = 132,102.90/x
  3. Step 3: Cross multiply
    431,624.70x = 647,485.65 × 132,102.90
  4. Step 4: Simplify right side
    431,624.70x = 85,534,732,073.39
  5. Step 5: Solve for x
    x = 85,534,732,073.39/431,624.70
  6. Step 6: Final answer
    x = 198,169.22

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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.