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Finding the Third Proportional to 2.17 and 3.28

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Solution

The third proportional to 2.17 and 3.28 is: 4.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    2.17 : 3.28 = 3.28 : x
  2. Step 2: Convert to fraction form
    2.17/3.28 = 3.28/x
  3. Step 3: Cross multiply
    2.17x = 3.28 × 3.28
  4. Step 4: Simplify right side
    2.17x = 10.74
  5. Step 5: Solve for x
    x = 10.74/2.17
  6. Step 6: Final answer
    x = 4.94

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.