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Finding the Fourth Proportional to 253.26, 379.80 and 131.22

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Solution

The fourth proportional to 253.26, 379.80 and 131.22 is: 196.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.26 : 379.80 = 131.22 : x
  2. Step 2: Convert to fraction form
    253.26/379.80 = 131.22/x
  3. Step 3: Cross multiply
    253.26x = 379.80 × 131.22
  4. Step 4: Simplify right side
    253.26x = 49,837.36
  5. Step 5: Solve for x
    x = 49,837.36/253.26
  6. Step 6: Final answer
    x = 196.78

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