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Finding the Third Proportional to 1,805 and 4,001

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Solution

The third proportional to 1,805 and 4,001 is: 8,868.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,805 : 4,001 = 4,001 : x
  2. Step 2: Convert to fraction form
    1,805/4,001 = 4,001/x
  3. Step 3: Cross multiply
    1,805x = 4,001 × 4,001
  4. Step 4: Simplify right side
    1,805x = 16,008,001
  5. Step 5: Solve for x
    x = 16,008,001/1,805
  6. Step 6: Final answer
    x = 8,868.70

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Why These Related Problems?

These problems maintain the same ratio (2.22) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.