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Finding the Fourth Proportional to 392,671.35, 541,872.14 and 239,965.16

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Solution

The fourth proportional to 392,671.35, 541,872.14 and 239,965.16 is: 331,143.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,671.35 : 541,872.14 = 239,965.16 : x
  2. Step 2: Convert to fraction form
    392,671.35/541,872.14 = 239,965.16/x
  3. Step 3: Cross multiply
    392,671.35x = 541,872.14 × 239,965.16
  4. Step 4: Simplify right side
    392,671.35x = 130,030,430,865.46
  5. Step 5: Solve for x
    x = 130,030,430,865.46/392,671.35
  6. Step 6: Final answer
    x = 331,143.16

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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.