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Finding the Third Proportional to 217.85 and 326.06

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Solution

The third proportional to 217.85 and 326.06 is: 488.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    217.85 : 326.06 = 326.06 : x
  2. Step 2: Convert to fraction form
    217.85/326.06 = 326.06/x
  3. Step 3: Cross multiply
    217.85x = 326.06 × 326.06
  4. Step 4: Simplify right side
    217.85x = 106,312.93
  5. Step 5: Solve for x
    x = 106,312.93/217.85
  6. Step 6: Final answer
    x = 488.02

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.