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Finding the Fourth Proportional to 611.79, 917.81 and 178.95

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Solution

The fourth proportional to 611.79, 917.81 and 178.95 is: 268.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.79 : 917.81 = 178.95 : x
  2. Step 2: Convert to fraction form
    611.79/917.81 = 178.95/x
  3. Step 3: Cross multiply
    611.79x = 917.81 × 178.95
  4. Step 4: Simplify right side
    611.79x = 164,237.96
  5. Step 5: Solve for x
    x = 164,237.96/611.79
  6. Step 6: Final answer
    x = 268.46

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