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Finding the Fourth Proportional to 2.34, 3.49 and 2.11

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Solution

The fourth proportional to 2.34, 3.49 and 2.11 is: 3.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2.34 : 3.49 = 2.11 : x
  2. Step 2: Convert to fraction form
    2.34/3.49 = 2.11/x
  3. Step 3: Cross multiply
    2.34x = 3.49 × 2.11
  4. Step 4: Simplify right side
    2.34x = 7.36
  5. Step 5: Solve for x
    x = 7.36/2.34
  6. Step 6: Final answer
    x = 3.15

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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.