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Finding the Third Proportional to 196,599 and 421,872

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Solution

The third proportional to 196,599 and 421,872 is: 905,274.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    196,599 : 421,872 = 421,872 : x
  2. Step 2: Convert to fraction form
    196,599/421,872 = 421,872/x
  3. Step 3: Cross multiply
    196,599x = 421,872 × 421,872
  4. Step 4: Simplify right side
    196,599x = 177,975,984,384
  5. Step 5: Solve for x
    x = 177,975,984,384/196,599
  6. Step 6: Final answer
    x = 905,274.11

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.