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Finding the Third Proportional to 257,504 and 397,918

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Solution

The third proportional to 257,504 and 397,918 is: 614,898.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,504 : 397,918 = 397,918 : x
  2. Step 2: Convert to fraction form
    257,504/397,918 = 397,918/x
  3. Step 3: Cross multiply
    257,504x = 397,918 × 397,918
  4. Step 4: Simplify right side
    257,504x = 158,338,734,724
  5. Step 5: Solve for x
    x = 158,338,734,724/257,504
  6. Step 6: Final answer
    x = 614,898.16

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.