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Finding the Fourth Proportional to 6.76, 10.16 and 3.92

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Solution

The fourth proportional to 6.76, 10.16 and 3.92 is: 5.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    6.76 : 10.16 = 3.92 : x
  2. Step 2: Convert to fraction form
    6.76/10.16 = 3.92/x
  3. Step 3: Cross multiply
    6.76x = 10.16 × 3.92
  4. Step 4: Simplify right side
    6.76x = 39.77
  5. Step 5: Solve for x
    x = 39.77/6.76
  6. Step 6: Final answer
    x = 5.88

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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.