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Finding the Fourth Proportional to 391,679.28, 587,519.26 and 107,372.93

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Solution

The fourth proportional to 391,679.28, 587,519.26 and 107,372.93 is: 161,059.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,679.28 : 587,519.26 = 107,372.93 : x
  2. Step 2: Convert to fraction form
    391,679.28/587,519.26 = 107,372.93/x
  3. Step 3: Cross multiply
    391,679.28x = 587,519.26 × 107,372.93
  4. Step 4: Simplify right side
    391,679.28x = 63,083,661,171.60
  5. Step 5: Solve for x
    x = 63,083,661,171.60/391,679.28
  6. Step 6: Final answer
    x = 161,059.48

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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.