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Finding the Third Proportional to 217.55 and 336.94

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Solution

The third proportional to 217.55 and 336.94 is: 521.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    217.55 : 336.94 = 336.94 : x
  2. Step 2: Convert to fraction form
    217.55/336.94 = 336.94/x
  3. Step 3: Cross multiply
    217.55x = 336.94 × 336.94
  4. Step 4: Simplify right side
    217.55x = 113,526.88
  5. Step 5: Solve for x
    x = 113,526.88/217.55
  6. Step 6: Final answer
    x = 521.85

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.