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Finding the Fourth Proportional to 458.22, 686.69 and 252.89

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Solution

The fourth proportional to 458.22, 686.69 and 252.89 is: 378.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    458.22 : 686.69 = 252.89 : x
  2. Step 2: Convert to fraction form
    458.22/686.69 = 252.89/x
  3. Step 3: Cross multiply
    458.22x = 686.69 × 252.89
  4. Step 4: Simplify right side
    458.22x = 173,652.34
  5. Step 5: Solve for x
    x = 173,652.34/458.22
  6. Step 6: Final answer
    x = 378.97

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