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Finding the Third Proportional to 122,272 and 257,816

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Solution

The third proportional to 122,272 and 257,816 is: 543,616.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,272 : 257,816 = 257,816 : x
  2. Step 2: Convert to fraction form
    122,272/257,816 = 257,816/x
  3. Step 3: Cross multiply
    122,272x = 257,816 × 257,816
  4. Step 4: Simplify right side
    122,272x = 66,469,089,856
  5. Step 5: Solve for x
    x = 66,469,089,856/122,272
  6. Step 6: Final answer
    x = 543,616.61

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Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.