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Finding the Fourth Proportional to 392,667.61, 541,866.95 and 239,961.40

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Solution

The fourth proportional to 392,667.61, 541,866.95 and 239,961.40 is: 331,137.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,667.61 : 541,866.95 = 239,961.40 : x
  2. Step 2: Convert to fraction form
    392,667.61/541,866.95 = 239,961.40/x
  3. Step 3: Cross multiply
    392,667.61x = 541,866.95 × 239,961.40
  4. Step 4: Simplify right side
    392,667.61x = 130,027,151,935.73
  5. Step 5: Solve for x
    x = 130,027,151,935.73/392,667.61
  6. Step 6: Final answer
    x = 331,137.96

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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.