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Finding the Third Proportional to 137 and 208.63

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Solution

The third proportional to 137 and 208.63 is: 317.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    137 : 208.63 = 208.63 : x
  2. Step 2: Convert to fraction form
    137/208.63 = 208.63/x
  3. Step 3: Cross multiply
    137x = 208.63 × 208.63
  4. Step 4: Simplify right side
    137x = 43,524.39
  5. Step 5: Solve for x
    x = 43,524.39/137
  6. Step 6: Final answer
    x = 317.70

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.