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Finding the Fourth Proportional to 396,006.20, 593,790.60 and 129,629.60

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Solution

The fourth proportional to 396,006.20, 593,790.60 and 129,629.60 is: 194,372.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,006.20 : 593,790.60 = 129,629.60 : x
  2. Step 2: Convert to fraction form
    396,006.20/593,790.60 = 129,629.60/x
  3. Step 3: Cross multiply
    396,006.20x = 593,790.60 × 129,629.60
  4. Step 4: Simplify right side
    396,006.20x = 76,972,837,961.76
  5. Step 5: Solve for x
    x = 76,972,837,961.76/396,006.20
  6. Step 6: Final answer
    x = 194,372.81

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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.