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Finding the Fourth Proportional to 492.71, 680.16 and 318.14

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Solution

The fourth proportional to 492.71, 680.16 and 318.14 is: 439.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    492.71 : 680.16 = 318.14 : x
  2. Step 2: Convert to fraction form
    492.71/680.16 = 318.14/x
  3. Step 3: Cross multiply
    492.71x = 680.16 × 318.14
  4. Step 4: Simplify right side
    492.71x = 216,386.10
  5. Step 5: Solve for x
    x = 216,386.10/492.71
  6. Step 6: Final answer
    x = 439.18

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