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Finding the Fourth Proportional to 455.23, 683.04 and 211.81

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Solution

The fourth proportional to 455.23, 683.04 and 211.81 is: 317.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    455.23 : 683.04 = 211.81 : x
  2. Step 2: Convert to fraction form
    455.23/683.04 = 211.81/x
  3. Step 3: Cross multiply
    455.23x = 683.04 × 211.81
  4. Step 4: Simplify right side
    455.23x = 144,674.70
  5. Step 5: Solve for x
    x = 144,674.70/455.23
  6. Step 6: Final answer
    x = 317.81

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