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Finding the Third Proportional to 1.81 and 4

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Solution

The third proportional to 1.81 and 4 is: 8.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1.81 : 4 = 4 : x
  2. Step 2: Convert to fraction form
    1.81/4 = 4/x
  3. Step 3: Cross multiply
    1.81x = 4 × 4
  4. Step 4: Simplify right side
    1.81x = 16
  5. Step 5: Solve for x
    x = 16/1.81
  6. Step 6: Final answer
    x = 8.83

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Why These Related Problems?

These problems maintain the same ratio (2.21) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.