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Finding the Fourth Proportional to 386.78, 533.93 and 252.18

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Solution

The fourth proportional to 386.78, 533.93 and 252.18 is: 348.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.78 : 533.93 = 252.18 : x
  2. Step 2: Convert to fraction form
    386.78/533.93 = 252.18/x
  3. Step 3: Cross multiply
    386.78x = 533.93 × 252.18
  4. Step 4: Simplify right side
    386.78x = 134,645.21
  5. Step 5: Solve for x
    x = 134,645.21/386.78
  6. Step 6: Final answer
    x = 348.12

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