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Finding the Fourth Proportional to 868,920, 1,199,147.51 and 481,710.78

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Solution

The fourth proportional to 868,920, 1,199,147.51 and 481,710.78 is: 664,781.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    868,920 : 1,199,147.51 = 481,710.78 : x
  2. Step 2: Convert to fraction form
    868,920/1,199,147.51 = 481,710.78/x
  3. Step 3: Cross multiply
    868,920x = 1,199,147.51 × 481,710.78
  4. Step 4: Simplify right side
    868,920x = 577,642,273,972.87
  5. Step 5: Solve for x
    x = 577,642,273,972.87/868,920
  6. Step 6: Final answer
    x = 664,781.88

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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.