Home / 2,091.22-3,135.85-791.78

Finding the Fourth Proportional to 2,091.22, 3,135.85 and 791.78

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Solution

The fourth proportional to 2,091.22, 3,135.85 and 791.78 is: 1,187.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,091.22 : 3,135.85 = 791.78 : x
  2. Step 2: Convert to fraction form
    2,091.22/3,135.85 = 791.78/x
  3. Step 3: Cross multiply
    2,091.22x = 3,135.85 × 791.78
  4. Step 4: Simplify right side
    2,091.22x = 2,482,885.65
  5. Step 5: Solve for x
    x = 2,482,885.65/2,091.22
  6. Step 6: Final answer
    x = 1,187.29

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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.