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Finding the Fourth Proportional to 399.36, 551.16 and 295.68

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Solution

The fourth proportional to 399.36, 551.16 and 295.68 is: 408.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.36 : 551.16 = 295.68 : x
  2. Step 2: Convert to fraction form
    399.36/551.16 = 295.68/x
  3. Step 3: Cross multiply
    399.36x = 551.16 × 295.68
  4. Step 4: Simplify right side
    399.36x = 162,966.99
  5. Step 5: Solve for x
    x = 162,966.99/399.36
  6. Step 6: Final answer
    x = 408.07

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