Home / 2,540.16-3,810.20-691.25

Finding the Fourth Proportional to 2,540.16, 3,810.20 and 691.25

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Solution

The fourth proportional to 2,540.16, 3,810.20 and 691.25 is: 1,036.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,540.16 : 3,810.20 = 691.25 : x
  2. Step 2: Convert to fraction form
    2,540.16/3,810.20 = 691.25/x
  3. Step 3: Cross multiply
    2,540.16x = 3,810.20 × 691.25
  4. Step 4: Simplify right side
    2,540.16x = 2,633,778.24
  5. Step 5: Solve for x
    x = 2,633,778.24/2,540.16
  6. Step 6: Final answer
    x = 1,036.86

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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.