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Finding the Fourth Proportional to 395,586.60, 593,456.28 and 129,275.28

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Solution

The fourth proportional to 395,586.60, 593,456.28 and 129,275.28 is: 193,937.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,586.60 : 593,456.28 = 129,275.28 : x
  2. Step 2: Convert to fraction form
    395,586.60/593,456.28 = 129,275.28/x
  3. Step 3: Cross multiply
    395,586.60x = 593,456.28 × 129,275.28
  4. Step 4: Simplify right side
    395,586.60x = 76,719,226,764.76
  5. Step 5: Solve for x
    x = 76,719,226,764.76/395,586.60
  6. Step 6: Final answer
    x = 193,937.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.