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Finding the Fourth Proportional to 381,861.48, 526,910.31 and 220,685.43

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Solution

The fourth proportional to 381,861.48, 526,910.31 and 220,685.43 is: 304,512.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,861.48 : 526,910.31 = 220,685.43 : x
  2. Step 2: Convert to fraction form
    381,861.48/526,910.31 = 220,685.43/x
  3. Step 3: Cross multiply
    381,861.48x = 526,910.31 × 220,685.43
  4. Step 4: Simplify right side
    381,861.48x = 116,281,428,333.78
  5. Step 5: Solve for x
    x = 116,281,428,333.78/381,861.48
  6. Step 6: Final answer
    x = 304,512.07

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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.