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Finding the Fourth Proportional to 391,714.06, 587,585.01 and 125,439.97

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Solution

The fourth proportional to 391,714.06, 587,585.01 and 125,439.97 is: 188,164.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,714.06 : 587,585.01 = 125,439.97 : x
  2. Step 2: Convert to fraction form
    391,714.06/587,585.01 = 125,439.97/x
  3. Step 3: Cross multiply
    391,714.06x = 587,585.01 × 125,439.97
  4. Step 4: Simplify right side
    391,714.06x = 73,706,646,026.85
  5. Step 5: Solve for x
    x = 73,706,646,026.85/391,714.06
  6. Step 6: Final answer
    x = 188,164.41

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.