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Finding the Fourth Proportional to 252,856.71, 379,311.75 and 84,318.30

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Solution

The fourth proportional to 252,856.71, 379,311.75 and 84,318.30 is: 126,486.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    252,856.71 : 379,311.75 = 84,318.30 : x
  2. Step 2: Convert to fraction form
    252,856.71/379,311.75 = 84,318.30/x
  3. Step 3: Cross multiply
    252,856.71x = 379,311.75 × 84,318.30
  4. Step 4: Simplify right side
    252,856.71x = 31,982,921,930.03
  5. Step 5: Solve for x
    x = 31,982,921,930.03/252,856.71
  6. Step 6: Final answer
    x = 126,486.35

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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.