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Finding the Fourth Proportional to 545.34, 818.07 and 220.71

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Solution

The fourth proportional to 545.34, 818.07 and 220.71 is: 331.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    545.34 : 818.07 = 220.71 : x
  2. Step 2: Convert to fraction form
    545.34/818.07 = 220.71/x
  3. Step 3: Cross multiply
    545.34x = 818.07 × 220.71
  4. Step 4: Simplify right side
    545.34x = 180,556.23
  5. Step 5: Solve for x
    x = 180,556.23/545.34
  6. Step 6: Final answer
    x = 331.09

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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.