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Finding the Fourth Proportional to 386.76, 533.88 and 255.72

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Solution

The fourth proportional to 386.76, 533.88 and 255.72 is: 352.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.76 : 533.88 = 255.72 : x
  2. Step 2: Convert to fraction form
    386.76/533.88 = 255.72/x
  3. Step 3: Cross multiply
    386.76x = 533.88 × 255.72
  4. Step 4: Simplify right side
    386.76x = 136,523.79
  5. Step 5: Solve for x
    x = 136,523.79/386.76
  6. Step 6: Final answer
    x = 352.99

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