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Finding the Fourth Proportional to 477.09, 715.95 and 217.44

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Solution

The fourth proportional to 477.09, 715.95 and 217.44 is: 326.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    477.09 : 715.95 = 217.44 : x
  2. Step 2: Convert to fraction form
    477.09/715.95 = 217.44/x
  3. Step 3: Cross multiply
    477.09x = 715.95 × 217.44
  4. Step 4: Simplify right side
    477.09x = 155,676.17
  5. Step 5: Solve for x
    x = 155,676.17/477.09
  6. Step 6: Final answer
    x = 326.30

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