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Finding the Fourth Proportional to 291,626.85, 437,398.74 and 91,921.28

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Solution

The fourth proportional to 291,626.85, 437,398.74 and 91,921.28 is: 137,868.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,626.85 : 437,398.74 = 91,921.28 : x
  2. Step 2: Convert to fraction form
    291,626.85/437,398.74 = 91,921.28/x
  3. Step 3: Cross multiply
    291,626.85x = 437,398.74 × 91,921.28
  4. Step 4: Simplify right side
    291,626.85x = 40,206,253,144.68
  5. Step 5: Solve for x
    x = 40,206,253,144.68/291,626.85
  6. Step 6: Final answer
    x = 137,868.83

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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.