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Finding the Fourth Proportional to 362.20, 543.06 and 217.72

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Solution

The fourth proportional to 362.20, 543.06 and 217.72 is: 326.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    362.20 : 543.06 = 217.72 : x
  2. Step 2: Convert to fraction form
    362.20/543.06 = 217.72/x
  3. Step 3: Cross multiply
    362.20x = 543.06 × 217.72
  4. Step 4: Simplify right side
    362.20x = 118,235.02
  5. Step 5: Solve for x
    x = 118,235.02/362.20
  6. Step 6: Final answer
    x = 326.44

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.