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Finding the Third Proportional to 208.50 and 335.77

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Solution

The third proportional to 208.50 and 335.77 is: 540.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    208.50 : 335.77 = 335.77 : x
  2. Step 2: Convert to fraction form
    208.50/335.77 = 335.77/x
  3. Step 3: Cross multiply
    208.50x = 335.77 × 335.77
  4. Step 4: Simplify right side
    208.50x = 112,738.55
  5. Step 5: Solve for x
    x = 112,738.55/208.50
  6. Step 6: Final answer
    x = 540.71

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Why These Related Problems?

These problems maintain the same ratio (1.61) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.