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Finding the Fourth Proportional to 2,257.74, 3,115.80 and 1,249.44

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Solution

The fourth proportional to 2,257.74, 3,115.80 and 1,249.44 is: 1,724.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,257.74 : 3,115.80 = 1,249.44 : x
  2. Step 2: Convert to fraction form
    2,257.74/3,115.80 = 1,249.44/x
  3. Step 3: Cross multiply
    2,257.74x = 3,115.80 × 1,249.44
  4. Step 4: Simplify right side
    2,257.74x = 3,893,005.15
  5. Step 5: Solve for x
    x = 3,893,005.15/2,257.74
  6. Step 6: Final answer
    x = 1,724.29

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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.