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Finding the Fourth Proportional to 2.68, 4.04 and 2.18

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Solution

The fourth proportional to 2.68, 4.04 and 2.18 is: 3.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2.68 : 4.04 = 2.18 : x
  2. Step 2: Convert to fraction form
    2.68/4.04 = 2.18/x
  3. Step 3: Cross multiply
    2.68x = 4.04 × 2.18
  4. Step 4: Simplify right side
    2.68x = 8.79
  5. Step 5: Solve for x
    x = 8.79/2.68
  6. Step 6: Final answer
    x = 3.28

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.