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Finding the Third Proportional to 57.19 and 122.69

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Solution

The third proportional to 57.19 and 122.69 is: 263.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    57.19 : 122.69 = 122.69 : x
  2. Step 2: Convert to fraction form
    57.19/122.69 = 122.69/x
  3. Step 3: Cross multiply
    57.19x = 122.69 × 122.69
  4. Step 4: Simplify right side
    57.19x = 15,051.98
  5. Step 5: Solve for x
    x = 15,051.98/57.19
  6. Step 6: Final answer
    x = 263.19

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.