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Finding the Fourth Proportional to 2,765.63, 4,149.11 and 791.29

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Solution

The fourth proportional to 2,765.63, 4,149.11 and 791.29 is: 1,187.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,765.63 : 4,149.11 = 791.29 : x
  2. Step 2: Convert to fraction form
    2,765.63/4,149.11 = 791.29/x
  3. Step 3: Cross multiply
    2,765.63x = 4,149.11 × 791.29
  4. Step 4: Simplify right side
    2,765.63x = 3,283,149.25
  5. Step 5: Solve for x
    x = 3,283,149.25/2,765.63
  6. Step 6: Final answer
    x = 1,187.13

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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.