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Finding the Fourth Proportional to 5.99, 8.22 and 5.81

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Solution

The fourth proportional to 5.99, 8.22 and 5.81 is: 7.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    5.99 : 8.22 = 5.81 : x
  2. Step 2: Convert to fraction form
    5.99/8.22 = 5.81/x
  3. Step 3: Cross multiply
    5.99x = 8.22 × 5.81
  4. Step 4: Simplify right side
    5.99x = 47.72
  5. Step 5: Solve for x
    x = 47.72/5.99
  6. Step 6: Final answer
    x = 7.97

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.