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Finding the Fourth Proportional to 3.42, 5.12 and 2.08

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Solution

The fourth proportional to 3.42, 5.12 and 2.08 is: 3.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    3.42 : 5.12 = 2.08 : x
  2. Step 2: Convert to fraction form
    3.42/5.12 = 2.08/x
  3. Step 3: Cross multiply
    3.42x = 5.12 × 2.08
  4. Step 4: Simplify right side
    3.42x = 10.65
  5. Step 5: Solve for x
    x = 10.65/3.42
  6. Step 6: Final answer
    x = 3.12

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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.