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Finding the Fourth Proportional to 2,691.26, 4,036.78 and 743.42

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Solution

The fourth proportional to 2,691.26, 4,036.78 and 743.42 is: 1,115.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,691.26 : 4,036.78 = 743.42 : x
  2. Step 2: Convert to fraction form
    2,691.26/4,036.78 = 743.42/x
  3. Step 3: Cross multiply
    2,691.26x = 4,036.78 × 743.42
  4. Step 4: Simplify right side
    2,691.26x = 3,001,022.99
  5. Step 5: Solve for x
    x = 3,001,022.99/2,691.26
  6. Step 6: Final answer
    x = 1,115.10

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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.