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Finding the Third Proportional to 1,638 and 2,765

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Solution

The third proportional to 1,638 and 2,765 is: 4,667.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,638 : 2,765 = 2,765 : x
  2. Step 2: Convert to fraction form
    1,638/2,765 = 2,765/x
  3. Step 3: Cross multiply
    1,638x = 2,765 × 2,765
  4. Step 4: Simplify right side
    1,638x = 7,645,225
  5. Step 5: Solve for x
    x = 7,645,225/1,638
  6. Step 6: Final answer
    x = 4,667.41

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Why These Related Problems?

These problems maintain the same ratio (1.69) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.