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Finding the Third Proportional to 5.42 and 11.77

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Solution

The third proportional to 5.42 and 11.77 is: 25.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    5.42 : 11.77 = 11.77 : x
  2. Step 2: Convert to fraction form
    5.42/11.77 = 11.77/x
  3. Step 3: Cross multiply
    5.42x = 11.77 × 11.77
  4. Step 4: Simplify right side
    5.42x = 138.56
  5. Step 5: Solve for x
    x = 138.56/5.42
  6. Step 6: Final answer
    x = 25.58

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.