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Finding the Fourth Proportional to 393.24, 590.34 and 255.80

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Solution

The fourth proportional to 393.24, 590.34 and 255.80 is: 384.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    393.24 : 590.34 = 255.80 : x
  2. Step 2: Convert to fraction form
    393.24/590.34 = 255.80/x
  3. Step 3: Cross multiply
    393.24x = 590.34 × 255.80
  4. Step 4: Simplify right side
    393.24x = 151,008.97
  5. Step 5: Solve for x
    x = 151,008.97/393.24
  6. Step 6: Final answer
    x = 384.01

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