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Finding the Fourth Proportional to 396,985.20, 595,650.60 and 199,993.20

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Solution

The fourth proportional to 396,985.20, 595,650.60 and 199,993.20 is: 300,076.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,985.20 : 595,650.60 = 199,993.20 : x
  2. Step 2: Convert to fraction form
    396,985.20/595,650.60 = 199,993.20/x
  3. Step 3: Cross multiply
    396,985.20x = 595,650.60 × 199,993.20
  4. Step 4: Simplify right side
    396,985.20x = 119,126,069,575.92
  5. Step 5: Solve for x
    x = 119,126,069,575.92/396,985.20
  6. Step 6: Final answer
    x = 300,076.85

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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.