Home / 2,540.20-3,810.12-691.44

Finding the Fourth Proportional to 2,540.20, 3,810.12 and 691.44

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Solution

The fourth proportional to 2,540.20, 3,810.12 and 691.44 is: 1,037.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,540.20 : 3,810.12 = 691.44 : x
  2. Step 2: Convert to fraction form
    2,540.20/3,810.12 = 691.44/x
  3. Step 3: Cross multiply
    2,540.20x = 3,810.12 × 691.44
  4. Step 4: Simplify right side
    2,540.20x = 2,634,469.37
  5. Step 5: Solve for x
    x = 2,634,469.37/2,540.20
  6. Step 6: Final answer
    x = 1,037.11

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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.