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Finding the Third Proportional to 3.21 and 5.45

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Solution

The third proportional to 3.21 and 5.45 is: 9.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    3.21 : 5.45 = 5.45 : x
  2. Step 2: Convert to fraction form
    3.21/5.45 = 5.45/x
  3. Step 3: Cross multiply
    3.21x = 5.45 × 5.45
  4. Step 4: Simplify right side
    3.21x = 29.73
  5. Step 5: Solve for x
    x = 29.73/3.21
  6. Step 6: Final answer
    x = 9.27

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Why These Related Problems?

These problems maintain the same ratio (1.70) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.