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Finding the Third Proportional to 256,736.25 and 399,097.13

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Solution

The third proportional to 256,736.25 and 399,097.13 is: 620,397.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,736.25 : 399,097.13 = 399,097.13 : x
  2. Step 2: Convert to fraction form
    256,736.25/399,097.13 = 399,097.13/x
  3. Step 3: Cross multiply
    256,736.25x = 399,097.13 × 399,097.13
  4. Step 4: Simplify right side
    256,736.25x = 159,278,515,183.27
  5. Step 5: Solve for x
    x = 159,278,515,183.27/256,736.25
  6. Step 6: Final answer
    x = 620,397.45

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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.