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Finding the Fourth Proportional to 545.20, 815.80 and 301.96

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Solution

The fourth proportional to 545.20, 815.80 and 301.96 is: 451.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    545.20 : 815.80 = 301.96 : x
  2. Step 2: Convert to fraction form
    545.20/815.80 = 301.96/x
  3. Step 3: Cross multiply
    545.20x = 815.80 × 301.96
  4. Step 4: Simplify right side
    545.20x = 246,338.97
  5. Step 5: Solve for x
    x = 246,338.97/545.20
  6. Step 6: Final answer
    x = 451.83

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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.