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Finding the Fourth Proportional to 388.42, 536.00 and 213.75

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Solution

The fourth proportional to 388.42, 536.00 and 213.75 is: 294.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.42 : 536.00 = 213.75 : x
  2. Step 2: Convert to fraction form
    388.42/536.00 = 213.75/x
  3. Step 3: Cross multiply
    388.42x = 536.00 × 213.75
  4. Step 4: Simplify right side
    388.42x = 114,568.93
  5. Step 5: Solve for x
    x = 114,568.93/388.42
  6. Step 6: Final answer
    x = 294.96

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