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Finding the Third Proportional to 122.25 and 192.75

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Solution

The third proportional to 122.25 and 192.75 is: 303.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    122.25 : 192.75 = 192.75 : x
  2. Step 2: Convert to fraction form
    122.25/192.75 = 192.75/x
  3. Step 3: Cross multiply
    122.25x = 192.75 × 192.75
  4. Step 4: Simplify right side
    122.25x = 37,152.56
  5. Step 5: Solve for x
    x = 37,152.56/122.25
  6. Step 6: Final answer
    x = 303.91

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Why These Related Problems?

These problems maintain the same ratio (1.58) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.