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Finding the Fourth Proportional to 395,221.43, 545,479.46 and 225,455.55

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Solution

The fourth proportional to 395,221.43, 545,479.46 and 225,455.55 is: 311,170.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,221.43 : 545,479.46 = 225,455.55 : x
  2. Step 2: Convert to fraction form
    395,221.43/545,479.46 = 225,455.55/x
  3. Step 3: Cross multiply
    395,221.43x = 545,479.46 × 225,455.55
  4. Step 4: Simplify right side
    395,221.43x = 122,981,374,577.21
  5. Step 5: Solve for x
    x = 122,981,374,577.21/395,221.43
  6. Step 6: Final answer
    x = 311,170.82

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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.