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Finding the Fourth Proportional to 1,691.98, 2,537.97 and 717.55

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Solution

The fourth proportional to 1,691.98, 2,537.97 and 717.55 is: 1,076.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,691.98 : 2,537.97 = 717.55 : x
  2. Step 2: Convert to fraction form
    1,691.98/2,537.97 = 717.55/x
  3. Step 3: Cross multiply
    1,691.98x = 2,537.97 × 717.55
  4. Step 4: Simplify right side
    1,691.98x = 1,821,120.37
  5. Step 5: Solve for x
    x = 1,821,120.37/1,691.98
  6. Step 6: Final answer
    x = 1,076.33

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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.