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Finding the Fourth Proportional to 2,255.87, 3,390.19 and 1,331.87

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Solution

The fourth proportional to 2,255.87, 3,390.19 and 1,331.87 is: 2,001.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,255.87 : 3,390.19 = 1,331.87 : x
  2. Step 2: Convert to fraction form
    2,255.87/3,390.19 = 1,331.87/x
  3. Step 3: Cross multiply
    2,255.87x = 3,390.19 × 1,331.87
  4. Step 4: Simplify right side
    2,255.87x = 4,515,272.07
  5. Step 5: Solve for x
    x = 4,515,272.07/2,255.87
  6. Step 6: Final answer
    x = 2,001.56

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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.