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Finding the Fourth Proportional to 392,672.85, 541,874.21 and 239,966.66

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Solution

The fourth proportional to 392,672.85, 541,874.21 and 239,966.66 is: 331,145.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,672.85 : 541,874.21 = 239,966.66 : x
  2. Step 2: Convert to fraction form
    392,672.85/541,874.21 = 239,966.66/x
  3. Step 3: Cross multiply
    392,672.85x = 541,874.21 × 239,966.66
  4. Step 4: Simplify right side
    392,672.85x = 130,031,740,404.63
  5. Step 5: Solve for x
    x = 130,031,740,404.63/392,672.85
  6. Step 6: Final answer
    x = 331,145.23

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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.