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Finding the Fourth Proportional to 351.09, 484.49 and 218.28

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Solution

The fourth proportional to 351.09, 484.49 and 218.28 is: 301.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.09 : 484.49 = 218.28 : x
  2. Step 2: Convert to fraction form
    351.09/484.49 = 218.28/x
  3. Step 3: Cross multiply
    351.09x = 484.49 × 218.28
  4. Step 4: Simplify right side
    351.09x = 105,753.39
  5. Step 5: Solve for x
    x = 105,753.39/351.09
  6. Step 6: Final answer
    x = 301.21

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.