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Finding the Third Proportional to 274,844 and 420,441

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Solution

The third proportional to 274,844 and 420,441 is: 643,167.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    274,844 : 420,441 = 420,441 : x
  2. Step 2: Convert to fraction form
    274,844/420,441 = 420,441/x
  3. Step 3: Cross multiply
    274,844x = 420,441 × 420,441
  4. Step 4: Simplify right side
    274,844x = 176,770,634,481
  5. Step 5: Solve for x
    x = 176,770,634,481/274,844
  6. Step 6: Final answer
    x = 643,167.16

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.