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Finding the Fourth Proportional to 403.55, 557.13 and 272.79

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Solution

The fourth proportional to 403.55, 557.13 and 272.79 is: 376.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.55 : 557.13 = 272.79 : x
  2. Step 2: Convert to fraction form
    403.55/557.13 = 272.79/x
  3. Step 3: Cross multiply
    403.55x = 557.13 × 272.79
  4. Step 4: Simplify right side
    403.55x = 151,979.49
  5. Step 5: Solve for x
    x = 151,979.49/403.55
  6. Step 6: Final answer
    x = 376.61

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