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Finding the Fourth Proportional to 395,609.91, 593,508.21 and 129,369.39

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Solution

The fourth proportional to 395,609.91, 593,508.21 and 129,369.39 is: 194,084.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,609.91 : 593,508.21 = 129,369.39 : x
  2. Step 2: Convert to fraction form
    395,609.91/593,508.21 = 129,369.39/x
  3. Step 3: Cross multiply
    395,609.91x = 593,508.21 × 129,369.39
  4. Step 4: Simplify right side
    395,609.91x = 76,781,795,087.69
  5. Step 5: Solve for x
    x = 76,781,795,087.69/395,609.91
  6. Step 6: Final answer
    x = 194,084.61

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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.