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Finding the Fourth Proportional to 457.57, 686.26 and 168.81

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Solution

The fourth proportional to 457.57, 686.26 and 168.81 is: 253.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.57 : 686.26 = 168.81 : x
  2. Step 2: Convert to fraction form
    457.57/686.26 = 168.81/x
  3. Step 3: Cross multiply
    457.57x = 686.26 × 168.81
  4. Step 4: Simplify right side
    457.57x = 115,847.55
  5. Step 5: Solve for x
    x = 115,847.55/457.57
  6. Step 6: Final answer
    x = 253.18

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