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Finding the Fourth Proportional to 351.88, 487.81 and 329.80

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Solution

The fourth proportional to 351.88, 487.81 and 329.80 is: 457.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.88 : 487.81 = 329.80 : x
  2. Step 2: Convert to fraction form
    351.88/487.81 = 329.80/x
  3. Step 3: Cross multiply
    351.88x = 487.81 × 329.80
  4. Step 4: Simplify right side
    351.88x = 160,879.74
  5. Step 5: Solve for x
    x = 160,879.74/351.88
  6. Step 6: Final answer
    x = 457.20

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