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Finding the Fourth Proportional to 54.34, 81.48 and 38.32

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Solution

The fourth proportional to 54.34, 81.48 and 38.32 is: 57.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    54.34 : 81.48 = 38.32 : x
  2. Step 2: Convert to fraction form
    54.34/81.48 = 38.32/x
  3. Step 3: Cross multiply
    54.34x = 81.48 × 38.32
  4. Step 4: Simplify right side
    54.34x = 3,122.31
  5. Step 5: Solve for x
    x = 3,122.31/54.34
  6. Step 6: Final answer
    x = 57.46

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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.