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Finding the Fourth Proportional to 398.72, 598.23 and 155.42

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Solution

The fourth proportional to 398.72, 598.23 and 155.42 is: 233.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    398.72 : 598.23 = 155.42 : x
  2. Step 2: Convert to fraction form
    398.72/598.23 = 155.42/x
  3. Step 3: Cross multiply
    398.72x = 598.23 × 155.42
  4. Step 4: Simplify right side
    398.72x = 92,976.91
  5. Step 5: Solve for x
    x = 92,976.91/398.72
  6. Step 6: Final answer
    x = 233.19

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