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Finding the Fourth Proportional to 2,523.09, 3,782.21 and 791.31

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Solution

The fourth proportional to 2,523.09, 3,782.21 and 791.31 is: 1,186.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,523.09 : 3,782.21 = 791.31 : x
  2. Step 2: Convert to fraction form
    2,523.09/3,782.21 = 791.31/x
  3. Step 3: Cross multiply
    2,523.09x = 3,782.21 × 791.31
  4. Step 4: Simplify right side
    2,523.09x = 2,992,896.64
  5. Step 5: Solve for x
    x = 2,992,896.64/2,523.09
  6. Step 6: Final answer
    x = 1,186.20

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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.