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Finding the Fourth Proportional to 331.13, 496.75 and 111.75

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Solution

The fourth proportional to 331.13, 496.75 and 111.75 is: 167.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.13 : 496.75 = 111.75 : x
  2. Step 2: Convert to fraction form
    331.13/496.75 = 111.75/x
  3. Step 3: Cross multiply
    331.13x = 496.75 × 111.75
  4. Step 4: Simplify right side
    331.13x = 55,511.81
  5. Step 5: Solve for x
    x = 55,511.81/331.13
  6. Step 6: Final answer
    x = 167.64

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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.