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Finding the Fourth Proportional to 576.16, 864.60 and 287.62

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Solution

The fourth proportional to 576.16, 864.60 and 287.62 is: 431.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    576.16 : 864.60 = 287.62 : x
  2. Step 2: Convert to fraction form
    576.16/864.60 = 287.62/x
  3. Step 3: Cross multiply
    576.16x = 864.60 × 287.62
  4. Step 4: Simplify right side
    576.16x = 248,676.25
  5. Step 5: Solve for x
    x = 248,676.25/576.16
  6. Step 6: Final answer
    x = 431.61

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