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Finding the Third Proportional to 1,628.25 and 3,939

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Solution

The third proportional to 1,628.25 and 3,939 is: 9,529.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,628.25 : 3,939 = 3,939 : x
  2. Step 2: Convert to fraction form
    1,628.25/3,939 = 3,939/x
  3. Step 3: Cross multiply
    1,628.25x = 3,939 × 3,939
  4. Step 4: Simplify right side
    1,628.25x = 15,515,721
  5. Step 5: Solve for x
    x = 15,515,721/1,628.25
  6. Step 6: Final answer
    x = 9,529.08

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Why These Related Problems?

These problems maintain the same ratio (2.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.