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Finding the Fourth Proportional to 289.42, 398.99 and 178.84

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Solution

The fourth proportional to 289.42, 398.99 and 178.84 is: 246.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    289.42 : 398.99 = 178.84 : x
  2. Step 2: Convert to fraction form
    289.42/398.99 = 178.84/x
  3. Step 3: Cross multiply
    289.42x = 398.99 × 178.84
  4. Step 4: Simplify right side
    289.42x = 71,354.48
  5. Step 5: Solve for x
    x = 71,354.48/289.42
  6. Step 6: Final answer
    x = 246.54

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