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Finding the Fourth Proportional to 281.21, 388.06 and 156.87

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Solution

The fourth proportional to 281.21, 388.06 and 156.87 is: 216.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.21 : 388.06 = 156.87 : x
  2. Step 2: Convert to fraction form
    281.21/388.06 = 156.87/x
  3. Step 3: Cross multiply
    281.21x = 388.06 × 156.87
  4. Step 4: Simplify right side
    281.21x = 60,874.97
  5. Step 5: Solve for x
    x = 60,874.97/281.21
  6. Step 6: Final answer
    x = 216.48

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