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Finding the Fourth Proportional to 353.11, 487.29 and 222.35

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Solution

The fourth proportional to 353.11, 487.29 and 222.35 is: 306.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.11 : 487.29 = 222.35 : x
  2. Step 2: Convert to fraction form
    353.11/487.29 = 222.35/x
  3. Step 3: Cross multiply
    353.11x = 487.29 × 222.35
  4. Step 4: Simplify right side
    353.11x = 108,346.70
  5. Step 5: Solve for x
    x = 108,346.70/353.11
  6. Step 6: Final answer
    x = 306.84

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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.