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Finding the Fourth Proportional to 347.78, 480.57 and 330.91

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Solution

The fourth proportional to 347.78, 480.57 and 330.91 is: 457.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.78 : 480.57 = 330.91 : x
  2. Step 2: Convert to fraction form
    347.78/480.57 = 330.91/x
  3. Step 3: Cross multiply
    347.78x = 480.57 × 330.91
  4. Step 4: Simplify right side
    347.78x = 159,025.42
  5. Step 5: Solve for x
    x = 159,025.42/347.78
  6. Step 6: Final answer
    x = 457.26

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