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Finding the Third Proportional to 299,979 and 421,901

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Solution

The third proportional to 299,979 and 421,901 is: 593,376.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,979 : 421,901 = 421,901 : x
  2. Step 2: Convert to fraction form
    299,979/421,901 = 421,901/x
  3. Step 3: Cross multiply
    299,979x = 421,901 × 421,901
  4. Step 4: Simplify right side
    299,979x = 178,000,453,801
  5. Step 5: Solve for x
    x = 178,000,453,801/299,979
  6. Step 6: Final answer
    x = 593,376.38

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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.