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Finding the Fourth Proportional to 2,687.85, 4,027.45 and 2,255.85

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Solution

The fourth proportional to 2,687.85, 4,027.45 and 2,255.85 is: 3,380.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,687.85 : 4,027.45 = 2,255.85 : x
  2. Step 2: Convert to fraction form
    2,687.85/4,027.45 = 2,255.85/x
  3. Step 3: Cross multiply
    2,687.85x = 4,027.45 × 2,255.85
  4. Step 4: Simplify right side
    2,687.85x = 9,085,323.08
  5. Step 5: Solve for x
    x = 9,085,323.08/2,687.85
  6. Step 6: Final answer
    x = 3,380.15

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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.