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Finding the Third Proportional to 5.50 and 7.50

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Solution

The third proportional to 5.50 and 7.50 is: 10.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    5.50 : 7.50 = 7.50 : x
  2. Step 2: Convert to fraction form
    5.50/7.50 = 7.50/x
  3. Step 3: Cross multiply
    5.50x = 7.50 × 7.50
  4. Step 4: Simplify right side
    5.50x = 56.25
  5. Step 5: Solve for x
    x = 56.25/5.50
  6. Step 6: Final answer
    x = 10.23

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.