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Finding the Third Proportional to 391,568 and 622,360

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Solution

The third proportional to 391,568 and 622,360 is: 989,181.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,568 : 622,360 = 622,360 : x
  2. Step 2: Convert to fraction form
    391,568/622,360 = 622,360/x
  3. Step 3: Cross multiply
    391,568x = 622,360 × 622,360
  4. Step 4: Simplify right side
    391,568x = 387,331,969,600
  5. Step 5: Solve for x
    x = 387,331,969,600/391,568
  6. Step 6: Final answer
    x = 989,181.88

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.