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Finding the Fourth Proportional to 2.82, 4.18 and 2.79

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Solution

The fourth proportional to 2.82, 4.18 and 2.79 is: 4.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2.82 : 4.18 = 2.79 : x
  2. Step 2: Convert to fraction form
    2.82/4.18 = 2.79/x
  3. Step 3: Cross multiply
    2.82x = 4.18 × 2.79
  4. Step 4: Simplify right side
    2.82x = 11.66
  5. Step 5: Solve for x
    x = 11.66/2.82
  6. Step 6: Final answer
    x = 4.14

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.