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Finding the Third Proportional to 269,811 and 389,800

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Solution

The third proportional to 269,811 and 389,800 is: 563,149.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    269,811 : 389,800 = 389,800 : x
  2. Step 2: Convert to fraction form
    269,811/389,800 = 389,800/x
  3. Step 3: Cross multiply
    269,811x = 389,800 × 389,800
  4. Step 4: Simplify right side
    269,811x = 151,944,040,000
  5. Step 5: Solve for x
    x = 151,944,040,000/269,811
  6. Step 6: Final answer
    x = 563,149.91

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Why These Related Problems?

These problems maintain the same ratio (1.44) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.