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Finding the Fourth Proportional to 392,578.60, 541,761.06 and 222,815.56

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Solution

The fourth proportional to 392,578.60, 541,761.06 and 222,815.56 is: 307,486.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,578.60 : 541,761.06 = 222,815.56 : x
  2. Step 2: Convert to fraction form
    392,578.60/541,761.06 = 222,815.56/x
  3. Step 3: Cross multiply
    392,578.60x = 541,761.06 × 222,815.56
  4. Step 4: Simplify right side
    392,578.60x = 120,712,793,970.09
  5. Step 5: Solve for x
    x = 120,712,793,970.09/392,578.60
  6. Step 6: Final answer
    x = 307,486.94

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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.