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Finding the Fourth Proportional to 318.67, 477.27 and 307.72

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Solution

The fourth proportional to 318.67, 477.27 and 307.72 is: 460.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.67 : 477.27 = 307.72 : x
  2. Step 2: Convert to fraction form
    318.67/477.27 = 307.72/x
  3. Step 3: Cross multiply
    318.67x = 477.27 × 307.72
  4. Step 4: Simplify right side
    318.67x = 146,865.52
  5. Step 5: Solve for x
    x = 146,865.52/318.67
  6. Step 6: Final answer
    x = 460.87

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