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Finding the Fourth Proportional to 545.22, 817.86 and 220.56

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Solution

The fourth proportional to 545.22, 817.86 and 220.56 is: 330.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    545.22 : 817.86 = 220.56 : x
  2. Step 2: Convert to fraction form
    545.22/817.86 = 220.56/x
  3. Step 3: Cross multiply
    545.22x = 817.86 × 220.56
  4. Step 4: Simplify right side
    545.22x = 180,387.20
  5. Step 5: Solve for x
    x = 180,387.20/545.22
  6. Step 6: Final answer
    x = 330.85

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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.