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Finding the Third Proportional to 280,890 and 397,449

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Solution

The third proportional to 280,890 and 397,449 is: 562,375.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,890 : 397,449 = 397,449 : x
  2. Step 2: Convert to fraction form
    280,890/397,449 = 397,449/x
  3. Step 3: Cross multiply
    280,890x = 397,449 × 397,449
  4. Step 4: Simplify right side
    280,890x = 157,965,707,601
  5. Step 5: Solve for x
    x = 157,965,707,601/280,890
  6. Step 6: Final answer
    x = 562,375.69

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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.