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Finding the Fourth Proportional to 455.02, 682.38 and 211.48

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Solution

The fourth proportional to 455.02, 682.38 and 211.48 is: 317.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    455.02 : 682.38 = 211.48 : x
  2. Step 2: Convert to fraction form
    455.02/682.38 = 211.48/x
  3. Step 3: Cross multiply
    455.02x = 682.38 × 211.48
  4. Step 4: Simplify right side
    455.02x = 144,309.72
  5. Step 5: Solve for x
    x = 144,309.72/455.02
  6. Step 6: Final answer
    x = 317.15

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