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Finding the Fourth Proportional to 457.54, 686.31 and 365.81

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Solution

The fourth proportional to 457.54, 686.31 and 365.81 is: 548.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.54 : 686.31 = 365.81 : x
  2. Step 2: Convert to fraction form
    457.54/686.31 = 365.81/x
  3. Step 3: Cross multiply
    457.54x = 686.31 × 365.81
  4. Step 4: Simplify right side
    457.54x = 251,053.80
  5. Step 5: Solve for x
    x = 251,053.80/457.54
  6. Step 6: Final answer
    x = 548.71

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