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Finding the Third Proportional to 117.75 and 261.75

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Solution

The third proportional to 117.75 and 261.75 is: 581.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    117.75 : 261.75 = 261.75 : x
  2. Step 2: Convert to fraction form
    117.75/261.75 = 261.75/x
  3. Step 3: Cross multiply
    117.75x = 261.75 × 261.75
  4. Step 4: Simplify right side
    117.75x = 68,513.06
  5. Step 5: Solve for x
    x = 68,513.06/117.75
  6. Step 6: Final answer
    x = 581.85

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Why These Related Problems?

These problems maintain the same ratio (2.22) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.