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Finding the Fourth Proportional to 57.36, 86.44 and 54.62

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Solution

The fourth proportional to 57.36, 86.44 and 54.62 is: 82.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    57.36 : 86.44 = 54.62 : x
  2. Step 2: Convert to fraction form
    57.36/86.44 = 54.62/x
  3. Step 3: Cross multiply
    57.36x = 86.44 × 54.62
  4. Step 4: Simplify right side
    57.36x = 4,721.35
  5. Step 5: Solve for x
    x = 4,721.35/57.36
  6. Step 6: Final answer
    x = 82.31

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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.