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Finding the Third Proportional to 518 and 622

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Solution

The third proportional to 518 and 622 is: 746.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    518 : 622 = 622 : x
  2. Step 2: Convert to fraction form
    518/622 = 622/x
  3. Step 3: Cross multiply
    518x = 622 × 622
  4. Step 4: Simplify right side
    518x = 386,884
  5. Step 5: Solve for x
    x = 386,884/518
  6. Step 6: Final answer
    x = 746.88

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