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Finding the Fourth Proportional to 3,949.87, 5,451.90 and 2,456.90

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Solution

The fourth proportional to 3,949.87, 5,451.90 and 2,456.90 is: 3,391.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,949.87 : 5,451.90 = 2,456.90 : x
  2. Step 2: Convert to fraction form
    3,949.87/5,451.90 = 2,456.90/x
  3. Step 3: Cross multiply
    3,949.87x = 5,451.90 × 2,456.90
  4. Step 4: Simplify right side
    3,949.87x = 13,394,745.85
  5. Step 5: Solve for x
    x = 13,394,745.85/3,949.87
  6. Step 6: Final answer
    x = 3,391.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.