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Finding the Third Proportional to 308.25 and 513.56

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Solution

The third proportional to 308.25 and 513.56 is: 855.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.25 : 513.56 = 513.56 : x
  2. Step 2: Convert to fraction form
    308.25/513.56 = 513.56/x
  3. Step 3: Cross multiply
    308.25x = 513.56 × 513.56
  4. Step 4: Simplify right side
    308.25x = 263,746.44
  5. Step 5: Solve for x
    x = 263,746.44/308.25
  6. Step 6: Final answer
    x = 855.63

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Why These Related Problems?

These problems maintain the same ratio (1.67) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.