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Finding the Third Proportional to 1,628 and 3,899

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Solution

The third proportional to 1,628 and 3,899 is: 9,337.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,628 : 3,899 = 3,899 : x
  2. Step 2: Convert to fraction form
    1,628/3,899 = 3,899/x
  3. Step 3: Cross multiply
    1,628x = 3,899 × 3,899
  4. Step 4: Simplify right side
    1,628x = 15,202,201
  5. Step 5: Solve for x
    x = 15,202,201/1,628
  6. Step 6: Final answer
    x = 9,337.96

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Why These Related Problems?

These problems maintain the same ratio (2.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.