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Finding the Fourth Proportional to 318.64, 439.70 and 178.76

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Solution

The fourth proportional to 318.64, 439.70 and 178.76 is: 246.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.64 : 439.70 = 178.76 : x
  2. Step 2: Convert to fraction form
    318.64/439.70 = 178.76/x
  3. Step 3: Cross multiply
    318.64x = 439.70 × 178.76
  4. Step 4: Simplify right side
    318.64x = 78,600.77
  5. Step 5: Solve for x
    x = 78,600.77/318.64
  6. Step 6: Final answer
    x = 246.68

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