Home / 2,195.31-3,291.11-961.79

Finding the Fourth Proportional to 2,195.31, 3,291.11 and 961.79

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Solution

The fourth proportional to 2,195.31, 3,291.11 and 961.79 is: 1,441.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,195.31 : 3,291.11 = 961.79 : x
  2. Step 2: Convert to fraction form
    2,195.31/3,291.11 = 961.79/x
  3. Step 3: Cross multiply
    2,195.31x = 3,291.11 × 961.79
  4. Step 4: Simplify right side
    2,195.31x = 3,165,335.42
  5. Step 5: Solve for x
    x = 3,165,335.42/2,195.31
  6. Step 6: Final answer
    x = 1,441.86

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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.