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Finding the Fourth Proportional to 54, 80.82 and 34.68

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Solution

The fourth proportional to 54, 80.82 and 34.68 is: 51.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    54 : 80.82 = 34.68 : x
  2. Step 2: Convert to fraction form
    54/80.82 = 34.68/x
  3. Step 3: Cross multiply
    54x = 80.82 × 34.68
  4. Step 4: Simplify right side
    54x = 2,802.84
  5. Step 5: Solve for x
    x = 2,802.84/54
  6. Step 6: Final answer
    x = 51.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.