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Finding the Fourth Proportional to 861,508.91, 1,188,862.62 and 539,396.62

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Solution

The fourth proportional to 861,508.91, 1,188,862.62 and 539,396.62 is: 744,355.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,508.91 : 1,188,862.62 = 539,396.62 : x
  2. Step 2: Convert to fraction form
    861,508.91/1,188,862.62 = 539,396.62/x
  3. Step 3: Cross multiply
    861,508.91x = 1,188,862.62 × 539,396.62
  4. Step 4: Simplify right side
    861,508.91x = 641,268,473,877.45
  5. Step 5: Solve for x
    x = 641,268,473,877.45/861,508.91
  6. Step 6: Final answer
    x = 744,355.01

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.