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Finding the Fourth Proportional to 391,314.75, 586,943.43 and 125,003.76

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Solution

The fourth proportional to 391,314.75, 586,943.43 and 125,003.76 is: 187,496.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,314.75 : 586,943.43 = 125,003.76 : x
  2. Step 2: Convert to fraction form
    391,314.75/586,943.43 = 125,003.76/x
  3. Step 3: Cross multiply
    391,314.75x = 586,943.43 × 125,003.76
  4. Step 4: Simplify right side
    391,314.75x = 73,370,135,657.30
  5. Step 5: Solve for x
    x = 73,370,135,657.30/391,314.75
  6. Step 6: Final answer
    x = 187,496.47

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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.