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Finding the Third Proportional to 402.13 and 622.25

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Solution

The third proportional to 402.13 and 622.25 is: 962.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.13 : 622.25 = 622.25 : x
  2. Step 2: Convert to fraction form
    402.13/622.25 = 622.25/x
  3. Step 3: Cross multiply
    402.13x = 622.25 × 622.25
  4. Step 4: Simplify right side
    402.13x = 387,195.06
  5. Step 5: Solve for x
    x = 387,195.06/402.13
  6. Step 6: Final answer
    x = 962.87

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.