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Finding the Fourth Proportional to 352.98, 487.11 and 205.61

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Solution

The fourth proportional to 352.98, 487.11 and 205.61 is: 283.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    352.98 : 487.11 = 205.61 : x
  2. Step 2: Convert to fraction form
    352.98/487.11 = 205.61/x
  3. Step 3: Cross multiply
    352.98x = 487.11 × 205.61
  4. Step 4: Simplify right side
    352.98x = 100,152.25
  5. Step 5: Solve for x
    x = 100,152.25/352.98
  6. Step 6: Final answer
    x = 283.73

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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.