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Finding the Third Proportional to 163.25 and 290.50

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Solution

The third proportional to 163.25 and 290.50 is: 516.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.25 : 290.50 = 290.50 : x
  2. Step 2: Convert to fraction form
    163.25/290.50 = 290.50/x
  3. Step 3: Cross multiply
    163.25x = 290.50 × 290.50
  4. Step 4: Simplify right side
    163.25x = 84,390.25
  5. Step 5: Solve for x
    x = 84,390.25/163.25
  6. Step 6: Final answer
    x = 516.94

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Why These Related Problems?

These problems maintain the same ratio (1.78) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.