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Finding the Third Proportional to 155,539 and 321,446

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Solution

The third proportional to 155,539 and 321,446 is: 664,319.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,539 : 321,446 = 321,446 : x
  2. Step 2: Convert to fraction form
    155,539/321,446 = 321,446/x
  3. Step 3: Cross multiply
    155,539x = 321,446 × 321,446
  4. Step 4: Simplify right side
    155,539x = 103,327,530,916
  5. Step 5: Solve for x
    x = 103,327,530,916/155,539
  6. Step 6: Final answer
    x = 664,319.12

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Why These Related Problems?

These problems maintain the same ratio (2.07) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.