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Finding the Fourth Proportional to 331.23, 496.85 and 87.77

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Solution

The fourth proportional to 331.23, 496.85 and 87.77 is: 131.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.23 : 496.85 = 87.77 : x
  2. Step 2: Convert to fraction form
    331.23/496.85 = 87.77/x
  3. Step 3: Cross multiply
    331.23x = 496.85 × 87.77
  4. Step 4: Simplify right side
    331.23x = 43,609.33
  5. Step 5: Solve for x
    x = 43,609.33/331.23
  6. Step 6: Final answer
    x = 131.66

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