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Finding the Fourth Proportional to 288.99, 398.79 and 157.97

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Solution

The fourth proportional to 288.99, 398.79 and 157.97 is: 217.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    288.99 : 398.79 = 157.97 : x
  2. Step 2: Convert to fraction form
    288.99/398.79 = 157.97/x
  3. Step 3: Cross multiply
    288.99x = 398.79 × 157.97
  4. Step 4: Simplify right side
    288.99x = 62,995.57
  5. Step 5: Solve for x
    x = 62,995.57/288.99
  6. Step 6: Final answer
    x = 217.99

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