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Finding the Fourth Proportional to 4.08, 6.12 and 2.57

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Solution

The fourth proportional to 4.08, 6.12 and 2.57 is: 3.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    4.08 : 6.12 = 2.57 : x
  2. Step 2: Convert to fraction form
    4.08/6.12 = 2.57/x
  3. Step 3: Cross multiply
    4.08x = 6.12 × 2.57
  4. Step 4: Simplify right side
    4.08x = 15.70
  5. Step 5: Solve for x
    x = 15.70/4.08
  6. Step 6: Final answer
    x = 3.85

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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.