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Finding the Fourth Proportional to 1,387,811.53, 1,914,593.46 and 929,073.88

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Solution

The fourth proportional to 1,387,811.53, 1,914,593.46 and 929,073.88 is: 1,281,729.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387,811.53 : 1,914,593.46 = 929,073.88 : x
  2. Step 2: Convert to fraction form
    1,387,811.53/1,914,593.46 = 929,073.88/x
  3. Step 3: Cross multiply
    1,387,811.53x = 1,914,593.46 × 929,073.88
  4. Step 4: Simplify right side
    1,387,811.53x = 1,778,798,781,411.85
  5. Step 5: Solve for x
    x = 1,778,798,781,411.85/1,387,811.53
  6. Step 6: Final answer
    x = 1,281,729.36

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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.