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Finding the Third Proportional to 4.87 and 5.50

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Solution

The third proportional to 4.87 and 5.50 is: 6.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    4.87 : 5.50 = 5.50 : x
  2. Step 2: Convert to fraction form
    4.87/5.50 = 5.50/x
  3. Step 3: Cross multiply
    4.87x = 5.50 × 5.50
  4. Step 4: Simplify right side
    4.87x = 30.24
  5. Step 5: Solve for x
    x = 30.24/4.87
  6. Step 6: Final answer
    x = 6.21

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Why These Related Problems?

These problems maintain the same ratio (1.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.