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Finding the Fourth Proportional to 399.37, 598.69 and 142.81

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Solution

The fourth proportional to 399.37, 598.69 and 142.81 is: 214.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.37 : 598.69 = 142.81 : x
  2. Step 2: Convert to fraction form
    399.37/598.69 = 142.81/x
  3. Step 3: Cross multiply
    399.37x = 598.69 × 142.81
  4. Step 4: Simplify right side
    399.37x = 85,498.92
  5. Step 5: Solve for x
    x = 85,498.92/399.37
  6. Step 6: Final answer
    x = 214.08

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