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Finding the Fourth Proportional to 390.16, 585.16 and 227.72

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Solution

The fourth proportional to 390.16, 585.16 and 227.72 is: 341.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    390.16 : 585.16 = 227.72 : x
  2. Step 2: Convert to fraction form
    390.16/585.16 = 227.72/x
  3. Step 3: Cross multiply
    390.16x = 585.16 × 227.72
  4. Step 4: Simplify right side
    390.16x = 133,252.64
  5. Step 5: Solve for x
    x = 133,252.64/390.16
  6. Step 6: Final answer
    x = 341.53

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