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Finding the Fourth Proportional to 861,863.60, 1,292,882.88 and 329,832.11

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Solution

The fourth proportional to 861,863.60, 1,292,882.88 and 329,832.11 is: 494,781.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,863.60 : 1,292,882.88 = 329,832.11 : x
  2. Step 2: Convert to fraction form
    861,863.60/1,292,882.88 = 329,832.11/x
  3. Step 3: Cross multiply
    861,863.60x = 1,292,882.88 × 329,832.11
  4. Step 4: Simplify right side
    861,863.60x = 426,434,281,828.86
  5. Step 5: Solve for x
    x = 426,434,281,828.86/861,863.60
  6. Step 6: Final answer
    x = 494,781.64

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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.