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Finding the Fourth Proportional to 431,568.60, 647,296.20 and 132,079.20

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Solution

The fourth proportional to 431,568.60, 647,296.20 and 132,079.20 is: 198,101.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,568.60 : 647,296.20 = 132,079.20 : x
  2. Step 2: Convert to fraction form
    431,568.60/647,296.20 = 132,079.20/x
  3. Step 3: Cross multiply
    431,568.60x = 647,296.20 × 132,079.20
  4. Step 4: Simplify right side
    431,568.60x = 85,494,364,259.04
  5. Step 5: Solve for x
    x = 85,494,364,259.04/431,568.60
  6. Step 6: Final answer
    x = 198,101.45

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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.