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Finding the Fourth Proportional to 225.78, 338.40 and 88.74

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Solution

The fourth proportional to 225.78, 338.40 and 88.74 is: 133.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    225.78 : 338.40 = 88.74 : x
  2. Step 2: Convert to fraction form
    225.78/338.40 = 88.74/x
  3. Step 3: Cross multiply
    225.78x = 338.40 × 88.74
  4. Step 4: Simplify right side
    225.78x = 30,029.62
  5. Step 5: Solve for x
    x = 30,029.62/225.78
  6. Step 6: Final answer
    x = 133.00

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