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Finding the Third Proportional to 120.94 and 255.19

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Solution

The third proportional to 120.94 and 255.19 is: 538.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    120.94 : 255.19 = 255.19 : x
  2. Step 2: Convert to fraction form
    120.94/255.19 = 255.19/x
  3. Step 3: Cross multiply
    120.94x = 255.19 × 255.19
  4. Step 4: Simplify right side
    120.94x = 65,120.66
  5. Step 5: Solve for x
    x = 65,120.66/120.94
  6. Step 6: Final answer
    x = 538.47

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Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.