Home / 2,311.12-3,467.25-667.78

Finding the Fourth Proportional to 2,311.12, 3,467.25 and 667.78

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Solution

The fourth proportional to 2,311.12, 3,467.25 and 667.78 is: 1,001.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,311.12 : 3,467.25 = 667.78 : x
  2. Step 2: Convert to fraction form
    2,311.12/3,467.25 = 667.78/x
  3. Step 3: Cross multiply
    2,311.12x = 3,467.25 × 667.78
  4. Step 4: Simplify right side
    2,311.12x = 2,315,360.21
  5. Step 5: Solve for x
    x = 2,315,360.21/2,311.12
  6. Step 6: Final answer
    x = 1,001.83

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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.