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Finding the Fourth Proportional to 545.87, 819.23 and 221.46

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Solution

The fourth proportional to 545.87, 819.23 and 221.46 is: 332.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    545.87 : 819.23 = 221.46 : x
  2. Step 2: Convert to fraction form
    545.87/819.23 = 221.46/x
  3. Step 3: Cross multiply
    545.87x = 819.23 × 221.46
  4. Step 4: Simplify right side
    545.87x = 181,425.57
  5. Step 5: Solve for x
    x = 181,425.57/545.87
  6. Step 6: Final answer
    x = 332.36

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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.