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Finding the Third Proportional to 2.21 and 3.16

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Solution

The third proportional to 2.21 and 3.16 is: 4.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    2.21 : 3.16 = 3.16 : x
  2. Step 2: Convert to fraction form
    2.21/3.16 = 3.16/x
  3. Step 3: Cross multiply
    2.21x = 3.16 × 3.16
  4. Step 4: Simplify right side
    2.21x = 10.01
  5. Step 5: Solve for x
    x = 10.01/2.21
  6. Step 6: Final answer
    x = 4.52

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Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.