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Finding the Fourth Proportional to 6.11, 8.42 and 3.68

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Solution

The fourth proportional to 6.11, 8.42 and 3.68 is: 5.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    6.11 : 8.42 = 3.68 : x
  2. Step 2: Convert to fraction form
    6.11/8.42 = 3.68/x
  3. Step 3: Cross multiply
    6.11x = 8.42 × 3.68
  4. Step 4: Simplify right side
    6.11x = 31.00
  5. Step 5: Solve for x
    x = 31.00/6.11
  6. Step 6: Final answer
    x = 5.08

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.