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Finding the Fourth Proportional to 392,037.60, 587,278.80 and 225,631.20

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Solution

The fourth proportional to 392,037.60, 587,278.80 and 225,631.20 is: 337,999.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,037.60 : 587,278.80 = 225,631.20 : x
  2. Step 2: Convert to fraction form
    392,037.60/587,278.80 = 225,631.20/x
  3. Step 3: Cross multiply
    392,037.60x = 587,278.80 × 225,631.20
  4. Step 4: Simplify right side
    392,037.60x = 132,508,420,378.56
  5. Step 5: Solve for x
    x = 132,508,420,378.56/392,037.60
  6. Step 6: Final answer
    x = 337,999.26

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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.