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Finding the Third Proportional to 112.75 and 277.75

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Solution

The third proportional to 112.75 and 277.75 is: 684.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    112.75 : 277.75 = 277.75 : x
  2. Step 2: Convert to fraction form
    112.75/277.75 = 277.75/x
  3. Step 3: Cross multiply
    112.75x = 277.75 × 277.75
  4. Step 4: Simplify right side
    112.75x = 77,145.06
  5. Step 5: Solve for x
    x = 77,145.06/112.75
  6. Step 6: Final answer
    x = 684.21

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Why These Related Problems?

These problems maintain the same ratio (2.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.