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Finding the Third Proportional to 392,766 and 622,926

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Solution

The third proportional to 392,766 and 622,926 is: 987,959.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,766 : 622,926 = 622,926 : x
  2. Step 2: Convert to fraction form
    392,766/622,926 = 622,926/x
  3. Step 3: Cross multiply
    392,766x = 622,926 × 622,926
  4. Step 4: Simplify right side
    392,766x = 388,036,801,476
  5. Step 5: Solve for x
    x = 388,036,801,476/392,766
  6. Step 6: Final answer
    x = 987,959.25

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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.