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Finding the Third Proportional to 2.50 and 6.50

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Solution

The third proportional to 2.50 and 6.50 is: 16.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2.50 : 6.50 = 6.50 : x
  2. Step 2: Convert to fraction form
    2.50/6.50 = 6.50/x
  3. Step 3: Cross multiply
    2.50x = 6.50 × 6.50
  4. Step 4: Simplify right side
    2.50x = 42.25
  5. Step 5: Solve for x
    x = 42.25/2.50
  6. Step 6: Final answer
    x = 16.90

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Why These Related Problems?

These problems maintain the same ratio (2.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.