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Finding the Fourth Proportional to 431,964.60, 648,071.25 and 132,489.12

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Solution

The fourth proportional to 431,964.60, 648,071.25 and 132,489.12 is: 198,771.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,964.60 : 648,071.25 = 132,489.12 : x
  2. Step 2: Convert to fraction form
    431,964.60/648,071.25 = 132,489.12/x
  3. Step 3: Cross multiply
    431,964.60x = 648,071.25 × 132,489.12
  4. Step 4: Simplify right side
    431,964.60x = 85,862,389,609.80
  5. Step 5: Solve for x
    x = 85,862,389,609.80/431,964.60
  6. Step 6: Final answer
    x = 198,771.82

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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.