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Finding the Fourth Proportional to 392,521.80, 541,649.28 and 222,755.88

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Solution

The fourth proportional to 392,521.80, 541,649.28 and 222,755.88 is: 307,385.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,521.80 : 541,649.28 = 222,755.88 : x
  2. Step 2: Convert to fraction form
    392,521.80/541,649.28 = 222,755.88/x
  3. Step 3: Cross multiply
    392,521.80x = 541,649.28 × 222,755.88
  4. Step 4: Simplify right side
    392,521.80x = 120,655,562,017.77
  5. Step 5: Solve for x
    x = 120,655,562,017.77/392,521.80
  6. Step 6: Final answer
    x = 307,385.63

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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.