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Finding the Fourth Proportional to 4.91, 7.39 and 3.42

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Solution

The fourth proportional to 4.91, 7.39 and 3.42 is: 5.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    4.91 : 7.39 = 3.42 : x
  2. Step 2: Convert to fraction form
    4.91/7.39 = 3.42/x
  3. Step 3: Cross multiply
    4.91x = 7.39 × 3.42
  4. Step 4: Simplify right side
    4.91x = 25.23
  5. Step 5: Solve for x
    x = 25.23/4.91
  6. Step 6: Final answer
    x = 5.14

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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.