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Finding the Fourth Proportional to 393.73, 589.88 and 187.99

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Solution

The fourth proportional to 393.73, 589.88 and 187.99 is: 281.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    393.73 : 589.88 = 187.99 : x
  2. Step 2: Convert to fraction form
    393.73/589.88 = 187.99/x
  3. Step 3: Cross multiply
    393.73x = 589.88 × 187.99
  4. Step 4: Simplify right side
    393.73x = 110,890.54
  5. Step 5: Solve for x
    x = 110,890.54/393.73
  6. Step 6: Final answer
    x = 281.64

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