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Finding the Fourth Proportional to 611.81, 917.71 and 178.96

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Solution

The fourth proportional to 611.81, 917.71 and 178.96 is: 268.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.81 : 917.71 = 178.96 : x
  2. Step 2: Convert to fraction form
    611.81/917.71 = 178.96/x
  3. Step 3: Cross multiply
    611.81x = 917.71 × 178.96
  4. Step 4: Simplify right side
    611.81x = 164,234.08
  5. Step 5: Solve for x
    x = 164,234.08/611.81
  6. Step 6: Final answer
    x = 268.44

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