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Finding the Fourth Proportional to 395,607.91, 593,505.21 and 129,367.39

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Solution

The fourth proportional to 395,607.91, 593,505.21 and 129,367.39 is: 194,081.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,607.91 : 593,505.21 = 129,367.39 : x
  2. Step 2: Convert to fraction form
    395,607.91/593,505.21 = 129,367.39/x
  3. Step 3: Cross multiply
    395,607.91x = 593,505.21 × 129,367.39
  4. Step 4: Simplify right side
    395,607.91x = 76,780,217,001.58
  5. Step 5: Solve for x
    x = 76,780,217,001.58/395,607.91
  6. Step 6: Final answer
    x = 194,081.60

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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.