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Finding the Fourth Proportional to 291,691.20, 437,598.72 and 92,069.28

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Solution

The fourth proportional to 291,691.20, 437,598.72 and 92,069.28 is: 138,123.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,691.20 : 437,598.72 = 92,069.28 : x
  2. Step 2: Convert to fraction form
    291,691.20/437,598.72 = 92,069.28/x
  3. Step 3: Cross multiply
    291,691.20x = 437,598.72 × 92,069.28
  4. Step 4: Simplify right side
    291,691.20x = 40,289,399,079.32
  5. Step 5: Solve for x
    x = 40,289,399,079.32/291,691.20
  6. Step 6: Final answer
    x = 138,123.46

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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.