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Finding the Fourth Proportional to 392,753.56, 588,581.19 and 212,449.79

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Solution

The fourth proportional to 392,753.56, 588,581.19 and 212,449.79 is: 318,377.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,753.56 : 588,581.19 = 212,449.79 : x
  2. Step 2: Convert to fraction form
    392,753.56/588,581.19 = 212,449.79/x
  3. Step 3: Cross multiply
    392,753.56x = 588,581.19 × 212,449.79
  4. Step 4: Simplify right side
    392,753.56x = 125,043,950,213.45
  5. Step 5: Solve for x
    x = 125,043,950,213.45/392,753.56
  6. Step 6: Final answer
    x = 318,377.64

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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.