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Finding the Fourth Proportional to 1,791.42, 2,687.29 and 695.87

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Solution

The fourth proportional to 1,791.42, 2,687.29 and 695.87 is: 1,043.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,791.42 : 2,687.29 = 695.87 : x
  2. Step 2: Convert to fraction form
    1,791.42/2,687.29 = 695.87/x
  3. Step 3: Cross multiply
    1,791.42x = 2,687.29 × 695.87
  4. Step 4: Simplify right side
    1,791.42x = 1,869,992.80
  5. Step 5: Solve for x
    x = 1,869,992.80/1,791.42
  6. Step 6: Final answer
    x = 1,043.86

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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.