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Finding the Third Proportional to 197,720 and 411,824

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Solution

The third proportional to 197,720 and 411,824 is: 857,773.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    197,720 : 411,824 = 411,824 : x
  2. Step 2: Convert to fraction form
    197,720/411,824 = 411,824/x
  3. Step 3: Cross multiply
    197,720x = 411,824 × 411,824
  4. Step 4: Simplify right side
    197,720x = 169,599,006,976
  5. Step 5: Solve for x
    x = 169,599,006,976/197,720
  6. Step 6: Final answer
    x = 857,773.65

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Why These Related Problems?

These problems maintain the same ratio (2.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.