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Finding the Fourth Proportional to 1,997.70, 2,997.91 and 699.17

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Solution

The fourth proportional to 1,997.70, 2,997.91 and 699.17 is: 1,049.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,997.70 : 2,997.91 = 699.17 : x
  2. Step 2: Convert to fraction form
    1,997.70/2,997.91 = 699.17/x
  3. Step 3: Cross multiply
    1,997.70x = 2,997.91 × 699.17
  4. Step 4: Simplify right side
    1,997.70x = 2,096,034.62
  5. Step 5: Solve for x
    x = 2,096,034.62/1,997.70
  6. Step 6: Final answer
    x = 1,049.23

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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.