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Finding the Fourth Proportional to 395,129.64, 545,273.30 and 225,366.60

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Solution

The fourth proportional to 395,129.64, 545,273.30 and 225,366.60 is: 311,002.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,129.64 : 545,273.30 = 225,366.60 : x
  2. Step 2: Convert to fraction form
    395,129.64/545,273.30 = 225,366.60/x
  3. Step 3: Cross multiply
    395,129.64x = 545,273.30 × 225,366.60
  4. Step 4: Simplify right side
    395,129.64x = 122,886,389,691.78
  5. Step 5: Solve for x
    x = 122,886,389,691.78/395,129.64
  6. Step 6: Final answer
    x = 311,002.71

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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.