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Finding the Fourth Proportional to 368.97, 509.20 and 221.69

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Solution

The fourth proportional to 368.97, 509.20 and 221.69 is: 305.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    368.97 : 509.20 = 221.69 : x
  2. Step 2: Convert to fraction form
    368.97/509.20 = 221.69/x
  3. Step 3: Cross multiply
    368.97x = 509.20 × 221.69
  4. Step 4: Simplify right side
    368.97x = 112,884.55
  5. Step 5: Solve for x
    x = 112,884.55/368.97
  6. Step 6: Final answer
    x = 305.95

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