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Finding the Fourth Proportional to 392,571.52, 541,439.04 and 331,100.80

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Solution

The fourth proportional to 392,571.52, 541,439.04 and 331,100.80 is: 456,657.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,571.52 : 541,439.04 = 331,100.80 : x
  2. Step 2: Convert to fraction form
    392,571.52/541,439.04 = 331,100.80/x
  3. Step 3: Cross multiply
    392,571.52x = 541,439.04 × 331,100.80
  4. Step 4: Simplify right side
    392,571.52x = 179,270,899,295.23
  5. Step 5: Solve for x
    x = 179,270,899,295.23/392,571.52
  6. Step 6: Final answer
    x = 456,657.93

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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.