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Finding the Fourth Proportional to 3.44, 5.15 and 2.16

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Solution

The fourth proportional to 3.44, 5.15 and 2.16 is: 3.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3.44 : 5.15 = 2.16 : x
  2. Step 2: Convert to fraction form
    3.44/5.15 = 2.16/x
  3. Step 3: Cross multiply
    3.44x = 5.15 × 2.16
  4. Step 4: Simplify right side
    3.44x = 11.14
  5. Step 5: Solve for x
    x = 11.14/3.44
  6. Step 6: Final answer
    x = 3.24

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.