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Finding the Third Proportional to 447.19 and 622.69

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Solution

The third proportional to 447.19 and 622.69 is: 867.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.19 : 622.69 = 622.69 : x
  2. Step 2: Convert to fraction form
    447.19/622.69 = 622.69/x
  3. Step 3: Cross multiply
    447.19x = 622.69 × 622.69
  4. Step 4: Simplify right side
    447.19x = 387,739.72
  5. Step 5: Solve for x
    x = 387,739.72/447.19
  6. Step 6: Final answer
    x = 867.06

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.