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Finding the Third Proportional to 201,028 and 422,720

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Solution

The third proportional to 201,028 and 422,720 is: 888,892.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,028 : 422,720 = 422,720 : x
  2. Step 2: Convert to fraction form
    201,028/422,720 = 422,720/x
  3. Step 3: Cross multiply
    201,028x = 422,720 × 422,720
  4. Step 4: Simplify right side
    201,028x = 178,692,198,400
  5. Step 5: Solve for x
    x = 178,692,198,400/201,028
  6. Step 6: Final answer
    x = 888,892.09

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Why These Related Problems?

These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.