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Finding the Third Proportional to 122.75 and 288.88

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Solution

The third proportional to 122.75 and 288.88 is: 679.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    122.75 : 288.88 = 288.88 : x
  2. Step 2: Convert to fraction form
    122.75/288.88 = 288.88/x
  3. Step 3: Cross multiply
    122.75x = 288.88 × 288.88
  4. Step 4: Simplify right side
    122.75x = 83,448.77
  5. Step 5: Solve for x
    x = 83,448.77/122.75
  6. Step 6: Final answer
    x = 679.83

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Why These Related Problems?

These problems maintain the same ratio (2.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.