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Finding the Fourth Proportional to 386.75, 533.72 and 231.50

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Solution

The fourth proportional to 386.75, 533.72 and 231.50 is: 319.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.75 : 533.72 = 231.50 : x
  2. Step 2: Convert to fraction form
    386.75/533.72 = 231.50/x
  3. Step 3: Cross multiply
    386.75x = 533.72 × 231.50
  4. Step 4: Simplify right side
    386.75x = 123,556.18
  5. Step 5: Solve for x
    x = 123,556.18/386.75
  6. Step 6: Final answer
    x = 319.47

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