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Finding the Fourth Proportional to 291,694.20, 437,487.30 and 81,288.60

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Solution

The fourth proportional to 291,694.20, 437,487.30 and 81,288.60 is: 121,917.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,694.20 : 437,487.30 = 81,288.60 : x
  2. Step 2: Convert to fraction form
    291,694.20/437,487.30 = 81,288.60/x
  3. Step 3: Cross multiply
    291,694.20x = 437,487.30 × 81,288.60
  4. Step 4: Simplify right side
    291,694.20x = 35,562,730,134.78
  5. Step 5: Solve for x
    x = 35,562,730,134.78/291,694.20
  6. Step 6: Final answer
    x = 121,917.85

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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.