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Finding the Fourth Proportional to 353.36, 487.82 and 222.55

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Solution

The fourth proportional to 353.36, 487.82 and 222.55 is: 307.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.36 : 487.82 = 222.55 : x
  2. Step 2: Convert to fraction form
    353.36/487.82 = 222.55/x
  3. Step 3: Cross multiply
    353.36x = 487.82 × 222.55
  4. Step 4: Simplify right side
    353.36x = 108,563.68
  5. Step 5: Solve for x
    x = 108,563.68/353.36
  6. Step 6: Final answer
    x = 307.23

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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.