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Finding the Third Proportional to 306,636 and 422,244

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Solution

The third proportional to 306,636 and 422,244 is: 581,438.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,636 : 422,244 = 422,244 : x
  2. Step 2: Convert to fraction form
    306,636/422,244 = 422,244/x
  3. Step 3: Cross multiply
    306,636x = 422,244 × 422,244
  4. Step 4: Simplify right side
    306,636x = 178,289,995,536
  5. Step 5: Solve for x
    x = 178,289,995,536/306,636
  6. Step 6: Final answer
    x = 581,438.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.