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Finding the Fourth Proportional to 396,991.20, 595,659.60 and 199,999.20

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Solution

The fourth proportional to 396,991.20, 595,659.60 and 199,999.20 is: 300,085.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,991.20 : 595,659.60 = 199,999.20 : x
  2. Step 2: Convert to fraction form
    396,991.20/595,659.60 = 199,999.20/x
  3. Step 3: Cross multiply
    396,991.20x = 595,659.60 × 199,999.20
  4. Step 4: Simplify right side
    396,991.20x = 119,131,443,472.32
  5. Step 5: Solve for x
    x = 119,131,443,472.32/396,991.20
  6. Step 6: Final answer
    x = 300,085.85

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1.5x scale

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.