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Finding the Fourth Proportional to 2,758.80, 4,139 and 1,027

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Solution

The fourth proportional to 2,758.80, 4,139 and 1,027 is: 1,540.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,758.80 : 4,139 = 1,027 : x
  2. Step 2: Convert to fraction form
    2,758.80/4,139 = 1,027/x
  3. Step 3: Cross multiply
    2,758.80x = 4,139 × 1,027
  4. Step 4: Simplify right side
    2,758.80x = 4,250,753
  5. Step 5: Solve for x
    x = 4,250,753/2,758.80
  6. Step 6: Final answer
    x = 1,540.80

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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.