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Finding the Fourth Proportional to 361.78, 542.32 and 156.15

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Solution

The fourth proportional to 361.78, 542.32 and 156.15 is: 234.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    361.78 : 542.32 = 156.15 : x
  2. Step 2: Convert to fraction form
    361.78/542.32 = 156.15/x
  3. Step 3: Cross multiply
    361.78x = 542.32 × 156.15
  4. Step 4: Simplify right side
    361.78x = 84,683.27
  5. Step 5: Solve for x
    x = 84,683.27/361.78
  6. Step 6: Final answer
    x = 234.07

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