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Finding the Fourth Proportional to 861,663, 1,189,122.30 and 539,270.04

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Solution

The fourth proportional to 861,663, 1,189,122.30 and 539,270.04 is: 744,209.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,663 : 1,189,122.30 = 539,270.04 : x
  2. Step 2: Convert to fraction form
    861,663/1,189,122.30 = 539,270.04/x
  3. Step 3: Cross multiply
    861,663x = 1,189,122.30 × 539,270.04
  4. Step 4: Simplify right side
    861,663x = 641,258,030,285.89
  5. Step 5: Solve for x
    x = 641,258,030,285.89/861,663
  6. Step 6: Final answer
    x = 744,209.78

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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.