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Finding the Third Proportional to 2.14 and 4.40

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Solution

The third proportional to 2.14 and 4.40 is: 9.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2.14 : 4.40 = 4.40 : x
  2. Step 2: Convert to fraction form
    2.14/4.40 = 4.40/x
  3. Step 3: Cross multiply
    2.14x = 4.40 × 4.40
  4. Step 4: Simplify right side
    2.14x = 19.40
  5. Step 5: Solve for x
    x = 19.40/2.14
  6. Step 6: Final answer
    x = 9.09

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Why These Related Problems?

These problems maintain the same ratio (2.06) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.