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Finding the Third Proportional to 2.18 and 5.00

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Solution

The third proportional to 2.18 and 5.00 is: 11.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2.18 : 5.00 = 5.00 : x
  2. Step 2: Convert to fraction form
    2.18/5.00 = 5.00/x
  3. Step 3: Cross multiply
    2.18x = 5.00 × 5.00
  4. Step 4: Simplify right side
    2.18x = 25.05
  5. Step 5: Solve for x
    x = 25.05/2.18
  6. Step 6: Final answer
    x = 11.50

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Why These Related Problems?

These problems maintain the same ratio (2.30) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.