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Finding the Fourth Proportional to 36.37, 54.75 and 31.41

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Solution

The fourth proportional to 36.37, 54.75 and 31.41 is: 47.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    36.37 : 54.75 = 31.41 : x
  2. Step 2: Convert to fraction form
    36.37/54.75 = 31.41/x
  3. Step 3: Cross multiply
    36.37x = 54.75 × 31.41
  4. Step 4: Simplify right side
    36.37x = 1,719.49
  5. Step 5: Solve for x
    x = 1,719.49/36.37
  6. Step 6: Final answer
    x = 47.28

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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.