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Finding the Fourth Proportional to 2.42, 3.61 and 2.20

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Solution

The fourth proportional to 2.42, 3.61 and 2.20 is: 3.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    2.42 : 3.61 = 2.20 : x
  2. Step 2: Convert to fraction form
    2.42/3.61 = 2.20/x
  3. Step 3: Cross multiply
    2.42x = 3.61 × 2.20
  4. Step 4: Simplify right side
    2.42x = 7.92
  5. Step 5: Solve for x
    x = 7.92/2.42
  6. Step 6: Final answer
    x = 3.27

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.