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Finding the Fourth Proportional to 355.86, 491.04 and 198.42

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Solution

The fourth proportional to 355.86, 491.04 and 198.42 is: 273.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.86 : 491.04 = 198.42 : x
  2. Step 2: Convert to fraction form
    355.86/491.04 = 198.42/x
  3. Step 3: Cross multiply
    355.86x = 491.04 × 198.42
  4. Step 4: Simplify right side
    355.86x = 97,432.16
  5. Step 5: Solve for x
    x = 97,432.16/355.86
  6. Step 6: Final answer
    x = 273.79

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