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Finding the Fourth Proportional to 462.12, 695.76 and 318.78

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Solution

The fourth proportional to 462.12, 695.76 and 318.78 is: 479.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    462.12 : 695.76 = 318.78 : x
  2. Step 2: Convert to fraction form
    462.12/695.76 = 318.78/x
  3. Step 3: Cross multiply
    462.12x = 695.76 × 318.78
  4. Step 4: Simplify right side
    462.12x = 221,794.37
  5. Step 5: Solve for x
    x = 221,794.37/462.12
  6. Step 6: Final answer
    x = 479.95

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