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Finding the Fourth Proportional to 392,793.28, 541,869.12 and 265,513.60

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Solution

The fourth proportional to 392,793.28, 541,869.12 and 265,513.60 is: 366,283.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,793.28 : 541,869.12 = 265,513.60 : x
  2. Step 2: Convert to fraction form
    392,793.28/541,869.12 = 265,513.60/x
  3. Step 3: Cross multiply
    392,793.28x = 541,869.12 × 265,513.60
  4. Step 4: Simplify right side
    392,793.28x = 143,873,620,780.03
  5. Step 5: Solve for x
    x = 143,873,620,780.03/392,793.28
  6. Step 6: Final answer
    x = 366,283.30

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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.