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Finding the Third Proportional to 170.50 and 422.50

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Solution

The third proportional to 170.50 and 422.50 is: 1,046.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.50 : 422.50 = 422.50 : x
  2. Step 2: Convert to fraction form
    170.50/422.50 = 422.50/x
  3. Step 3: Cross multiply
    170.50x = 422.50 × 422.50
  4. Step 4: Simplify right side
    170.50x = 178,506.25
  5. Step 5: Solve for x
    x = 178,506.25/170.50
  6. Step 6: Final answer
    x = 1,046.96

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Why These Related Problems?

These problems maintain the same ratio (2.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.