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Finding the Third Proportional to 3.64 and 5.12

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Solution

The third proportional to 3.64 and 5.12 is: 7.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3.64 : 5.12 = 5.12 : x
  2. Step 2: Convert to fraction form
    3.64/5.12 = 5.12/x
  3. Step 3: Cross multiply
    3.64x = 5.12 × 5.12
  4. Step 4: Simplify right side
    3.64x = 26.23
  5. Step 5: Solve for x
    x = 26.23/3.64
  6. Step 6: Final answer
    x = 7.21

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Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.