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Finding the Fourth Proportional to 3.89, 5.82 and 2.19

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Solution

The fourth proportional to 3.89, 5.82 and 2.19 is: 3.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3.89 : 5.82 = 2.19 : x
  2. Step 2: Convert to fraction form
    3.89/5.82 = 2.19/x
  3. Step 3: Cross multiply
    3.89x = 5.82 × 2.19
  4. Step 4: Simplify right side
    3.89x = 12.77
  5. Step 5: Solve for x
    x = 12.77/3.89
  6. Step 6: Final answer
    x = 3.28

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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.