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Finding the Fourth Proportional to 353.80, 488.37 and 220.96

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Solution

The fourth proportional to 353.80, 488.37 and 220.96 is: 305.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.80 : 488.37 = 220.96 : x
  2. Step 2: Convert to fraction form
    353.80/488.37 = 220.96/x
  3. Step 3: Cross multiply
    353.80x = 488.37 × 220.96
  4. Step 4: Simplify right side
    353.80x = 107,910.24
  5. Step 5: Solve for x
    x = 107,910.24/353.80
  6. Step 6: Final answer
    x = 305.00

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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.