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Finding the Third Proportional to 117.19 and 206.75

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Solution

The third proportional to 117.19 and 206.75 is: 364.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    117.19 : 206.75 = 206.75 : x
  2. Step 2: Convert to fraction form
    117.19/206.75 = 206.75/x
  3. Step 3: Cross multiply
    117.19x = 206.75 × 206.75
  4. Step 4: Simplify right side
    117.19x = 42,745.56
  5. Step 5: Solve for x
    x = 42,745.56/117.19
  6. Step 6: Final answer
    x = 364.76

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Why These Related Problems?

These problems maintain the same ratio (1.76) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.