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Finding the Third Proportional to 299,966 and 421,880

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Solution

The third proportional to 299,966 and 421,880 is: 593,343.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,966 : 421,880 = 421,880 : x
  2. Step 2: Convert to fraction form
    299,966/421,880 = 421,880/x
  3. Step 3: Cross multiply
    299,966x = 421,880 × 421,880
  4. Step 4: Simplify right side
    299,966x = 177,982,734,400
  5. Step 5: Solve for x
    x = 177,982,734,400/299,966
  6. Step 6: Final answer
    x = 593,343.03

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Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.