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Finding the Fourth Proportional to 318.41, 477.23 and 135.75

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Solution

The fourth proportional to 318.41, 477.23 and 135.75 is: 203.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.41 : 477.23 = 135.75 : x
  2. Step 2: Convert to fraction form
    318.41/477.23 = 135.75/x
  3. Step 3: Cross multiply
    318.41x = 477.23 × 135.75
  4. Step 4: Simplify right side
    318.41x = 64,783.29
  5. Step 5: Solve for x
    x = 64,783.29/318.41
  6. Step 6: Final answer
    x = 203.46

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