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Finding the Third Proportional to 3.16 and 3.80

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Solution

The third proportional to 3.16 and 3.80 is: 4.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3.16 : 3.80 = 3.80 : x
  2. Step 2: Convert to fraction form
    3.16/3.80 = 3.80/x
  3. Step 3: Cross multiply
    3.16x = 3.80 × 3.80
  4. Step 4: Simplify right side
    3.16x = 14.42
  5. Step 5: Solve for x
    x = 14.42/3.16
  6. Step 6: Final answer
    x = 4.56

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Why These Related Problems?

These problems maintain the same ratio (1.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.