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Finding the Fourth Proportional to 392,665.61, 541,864.19 and 239,959.40

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Solution

The fourth proportional to 392,665.61, 541,864.19 and 239,959.40 is: 331,135.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,665.61 : 541,864.19 = 239,959.40 : x
  2. Step 2: Convert to fraction form
    392,665.61/541,864.19 = 239,959.40/x
  3. Step 3: Cross multiply
    392,665.61x = 541,864.19 × 239,959.40
  4. Step 4: Simplify right side
    392,665.61x = 130,025,405,913.89
  5. Step 5: Solve for x
    x = 130,025,405,913.89/392,665.61
  6. Step 6: Final answer
    x = 331,135.20

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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.