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Finding the Third Proportional to 117.38 and 251.63

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Solution

The third proportional to 117.38 and 251.63 is: 539.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    117.38 : 251.63 = 251.63 : x
  2. Step 2: Convert to fraction form
    117.38/251.63 = 251.63/x
  3. Step 3: Cross multiply
    117.38x = 251.63 × 251.63
  4. Step 4: Simplify right side
    117.38x = 63,315.14
  5. Step 5: Solve for x
    x = 63,315.14/117.38
  6. Step 6: Final answer
    x = 539.43

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.