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Finding the Fourth Proportional to 457.17, 685.11 and 261.77

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Solution

The fourth proportional to 457.17, 685.11 and 261.77 is: 392.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.17 : 685.11 = 261.77 : x
  2. Step 2: Convert to fraction form
    457.17/685.11 = 261.77/x
  3. Step 3: Cross multiply
    457.17x = 685.11 × 261.77
  4. Step 4: Simplify right side
    457.17x = 179,341.24
  5. Step 5: Solve for x
    x = 179,341.24/457.17
  6. Step 6: Final answer
    x = 392.29

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