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Finding the Third Proportional to 639.63 and 1,327.25

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Solution

The third proportional to 639.63 and 1,327.25 is: 2,754.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.63 : 1,327.25 = 1,327.25 : x
  2. Step 2: Convert to fraction form
    639.63/1,327.25 = 1,327.25/x
  3. Step 3: Cross multiply
    639.63x = 1,327.25 × 1,327.25
  4. Step 4: Simplify right side
    639.63x = 1,761,592.56
  5. Step 5: Solve for x
    x = 1,761,592.56/639.63
  6. Step 6: Final answer
    x = 2,754.10

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Why These Related Problems?

These problems maintain the same ratio (2.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.