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Finding the Fourth Proportional to 422,366.60, 582,864.18 and 231,391.88

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Solution

The fourth proportional to 422,366.60, 582,864.18 and 231,391.88 is: 319,319.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,366.60 : 582,864.18 = 231,391.88 : x
  2. Step 2: Convert to fraction form
    422,366.60/582,864.18 = 231,391.88/x
  3. Step 3: Cross multiply
    422,366.60x = 582,864.18 × 231,391.88
  4. Step 4: Simplify right side
    422,366.60x = 134,870,038,394.86
  5. Step 5: Solve for x
    x = 134,870,038,394.86/422,366.60
  6. Step 6: Final answer
    x = 319,319.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.