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Finding the Fourth Proportional to 351.44, 484.90 and 218.60

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Solution

The fourth proportional to 351.44, 484.90 and 218.60 is: 301.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.44 : 484.90 = 218.60 : x
  2. Step 2: Convert to fraction form
    351.44/484.90 = 218.60/x
  3. Step 3: Cross multiply
    351.44x = 484.90 × 218.60
  4. Step 4: Simplify right side
    351.44x = 105,998.05
  5. Step 5: Solve for x
    x = 105,998.05/351.44
  6. Step 6: Final answer
    x = 301.61

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Why These Related Problems?

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