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Finding the Fourth Proportional to 383.22, 574.90 and 139.92

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Solution

The fourth proportional to 383.22, 574.90 and 139.92 is: 209.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    383.22 : 574.90 = 139.92 : x
  2. Step 2: Convert to fraction form
    383.22/574.90 = 139.92/x
  3. Step 3: Cross multiply
    383.22x = 574.90 × 139.92
  4. Step 4: Simplify right side
    383.22x = 80,440.01
  5. Step 5: Solve for x
    x = 80,440.01/383.22
  6. Step 6: Final answer
    x = 209.91

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