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Finding the Fourth Proportional to 318.02, 438.63 and 219.74

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Solution

The fourth proportional to 318.02, 438.63 and 219.74 is: 303.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.02 : 438.63 = 219.74 : x
  2. Step 2: Convert to fraction form
    318.02/438.63 = 219.74/x
  3. Step 3: Cross multiply
    318.02x = 438.63 × 219.74
  4. Step 4: Simplify right side
    318.02x = 96,384.56
  5. Step 5: Solve for x
    x = 96,384.56/318.02
  6. Step 6: Final answer
    x = 303.08

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