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Finding the Fourth Proportional to 1,791.43, 2,687.21 and 493.00

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Solution

The fourth proportional to 1,791.43, 2,687.21 and 493.00 is: 739.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,791.43 : 2,687.21 = 493.00 : x
  2. Step 2: Convert to fraction form
    1,791.43/2,687.21 = 493.00/x
  3. Step 3: Cross multiply
    1,791.43x = 2,687.21 × 493.00
  4. Step 4: Simplify right side
    1,791.43x = 1,324,778.63
  5. Step 5: Solve for x
    x = 1,324,778.63/1,791.43
  6. Step 6: Final answer
    x = 739.51

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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.