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Finding the Fourth Proportional to 391,533.72, 587,292.34 and 125,294.28

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Solution

The fourth proportional to 391,533.72, 587,292.34 and 125,294.28 is: 187,938.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,533.72 : 587,292.34 = 125,294.28 : x
  2. Step 2: Convert to fraction form
    391,533.72/587,292.34 = 125,294.28/x
  3. Step 3: Cross multiply
    391,533.72x = 587,292.34 × 125,294.28
  4. Step 4: Simplify right side
    391,533.72x = 73,584,370,889.82
  5. Step 5: Solve for x
    x = 73,584,370,889.82/391,533.72
  6. Step 6: Final answer
    x = 187,938.78

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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.