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Finding the Fourth Proportional to 391,754.31, 587,615.05 and 125,508.93

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Solution

The fourth proportional to 391,754.31, 587,615.05 and 125,508.93 is: 188,258.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,754.31 : 587,615.05 = 125,508.93 : x
  2. Step 2: Convert to fraction form
    391,754.31/587,615.05 = 125,508.93/x
  3. Step 3: Cross multiply
    391,754.31x = 587,615.05 × 125,508.93
  4. Step 4: Simplify right side
    391,754.31x = 73,750,938,537.84
  5. Step 5: Solve for x
    x = 73,750,938,537.84/391,754.31
  6. Step 6: Final answer
    x = 188,258.14

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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.