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Finding the Third Proportional to 301.25 and 648.13

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Solution

The third proportional to 301.25 and 648.13 is: 1,394.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    301.25 : 648.13 = 648.13 : x
  2. Step 2: Convert to fraction form
    301.25/648.13 = 648.13/x
  3. Step 3: Cross multiply
    301.25x = 648.13 × 648.13
  4. Step 4: Simplify right side
    301.25x = 420,066.02
  5. Step 5: Solve for x
    x = 420,066.02/301.25
  6. Step 6: Final answer
    x = 1,394.41

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.