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Finding the Fourth Proportional to 351.56, 485.19 and 220.55

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Solution

The fourth proportional to 351.56, 485.19 and 220.55 is: 304.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.56 : 485.19 = 220.55 : x
  2. Step 2: Convert to fraction form
    351.56/485.19 = 220.55/x
  3. Step 3: Cross multiply
    351.56x = 485.19 × 220.55
  4. Step 4: Simplify right side
    351.56x = 107,006.23
  5. Step 5: Solve for x
    x = 107,006.23/351.56
  6. Step 6: Final answer
    x = 304.37

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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.