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Finding the Fourth Proportional to 395,781.66, 593,721.72 and 129,470.58

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Solution

The fourth proportional to 395,781.66, 593,721.72 and 129,470.58 is: 194,221.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,781.66 : 593,721.72 = 129,470.58 : x
  2. Step 2: Convert to fraction form
    395,781.66/593,721.72 = 129,470.58/x
  3. Step 3: Cross multiply
    395,781.66x = 593,721.72 × 129,470.58
  4. Step 4: Simplify right side
    395,781.66x = 76,869,495,447.00
  5. Step 5: Solve for x
    x = 76,869,495,447.00/395,781.66
  6. Step 6: Final answer
    x = 194,221.97

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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.