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Finding the Fourth Proportional to 1,691.68, 2,537.52 and 717.80

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Solution

The fourth proportional to 1,691.68, 2,537.52 and 717.80 is: 1,076.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,691.68 : 2,537.52 = 717.80 : x
  2. Step 2: Convert to fraction form
    1,691.68/2,537.52 = 717.80/x
  3. Step 3: Cross multiply
    1,691.68x = 2,537.52 × 717.80
  4. Step 4: Simplify right side
    1,691.68x = 1,821,431.86
  5. Step 5: Solve for x
    x = 1,821,431.86/1,691.68
  6. Step 6: Final answer
    x = 1,076.70

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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.