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Finding the Fourth Proportional to 399.95, 599.61 and 191.61

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Solution

The fourth proportional to 399.95, 599.61 and 191.61 is: 287.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.95 : 599.61 = 191.61 : x
  2. Step 2: Convert to fraction form
    399.95/599.61 = 191.61/x
  3. Step 3: Cross multiply
    399.95x = 599.61 × 191.61
  4. Step 4: Simplify right side
    399.95x = 114,891.27
  5. Step 5: Solve for x
    x = 114,891.27/399.95
  6. Step 6: Final answer
    x = 287.27

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