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Finding the Fourth Proportional to 717,691.20, 989,748.57 and 523,791.78

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Solution

The fourth proportional to 717,691.20, 989,748.57 and 523,791.78 is: 722,347.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,691.20 : 989,748.57 = 523,791.78 : x
  2. Step 2: Convert to fraction form
    717,691.20/989,748.57 = 523,791.78/x
  3. Step 3: Cross multiply
    717,691.20x = 989,748.57 × 523,791.78
  4. Step 4: Simplify right side
    717,691.20x = 518,422,165,232.76
  5. Step 5: Solve for x
    x = 518,422,165,232.76/717,691.20
  6. Step 6: Final answer
    x = 722,347.11

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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.