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Finding the Third Proportional to 1,997 and 4,405

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Solution

The third proportional to 1,997 and 4,405 is: 9,716.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,997 : 4,405 = 4,405 : x
  2. Step 2: Convert to fraction form
    1,997/4,405 = 4,405/x
  3. Step 3: Cross multiply
    1,997x = 4,405 × 4,405
  4. Step 4: Simplify right side
    1,997x = 19,404,025
  5. Step 5: Solve for x
    x = 19,404,025/1,997
  6. Step 6: Final answer
    x = 9,716.59

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Why These Related Problems?

These problems maintain the same ratio (2.21) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.