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Finding the Fourth Proportional to 383.04, 574.58 and 139.72

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Solution

The fourth proportional to 383.04, 574.58 and 139.72 is: 209.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    383.04 : 574.58 = 139.72 : x
  2. Step 2: Convert to fraction form
    383.04/574.58 = 139.72/x
  3. Step 3: Cross multiply
    383.04x = 574.58 × 139.72
  4. Step 4: Simplify right side
    383.04x = 80,280.32
  5. Step 5: Solve for x
    x = 80,280.32/383.04
  6. Step 6: Final answer
    x = 209.59

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