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Finding the Fourth Proportional to 2.84, 3.92 and 2.24

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Solution

The fourth proportional to 2.84, 3.92 and 2.24 is: 3.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2.84 : 3.92 = 2.24 : x
  2. Step 2: Convert to fraction form
    2.84/3.92 = 2.24/x
  3. Step 3: Cross multiply
    2.84x = 3.92 × 2.24
  4. Step 4: Simplify right side
    2.84x = 8.77
  5. Step 5: Solve for x
    x = 8.77/2.84
  6. Step 6: Final answer
    x = 3.09

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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.