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Finding the Third Proportional to 338.25 and 516.50

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Solution

The third proportional to 338.25 and 516.50 is: 788.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    338.25 : 516.50 = 516.50 : x
  2. Step 2: Convert to fraction form
    338.25/516.50 = 516.50/x
  3. Step 3: Cross multiply
    338.25x = 516.50 × 516.50
  4. Step 4: Simplify right side
    338.25x = 266,772.25
  5. Step 5: Solve for x
    x = 266,772.25/338.25
  6. Step 6: Final answer
    x = 788.68

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.