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Finding the Fourth Proportional to 545.67, 818.23 and 220.79

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Solution

The fourth proportional to 545.67, 818.23 and 220.79 is: 331.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    545.67 : 818.23 = 220.79 : x
  2. Step 2: Convert to fraction form
    545.67/818.23 = 220.79/x
  3. Step 3: Cross multiply
    545.67x = 818.23 × 220.79
  4. Step 4: Simplify right side
    545.67x = 180,657.00
  5. Step 5: Solve for x
    x = 180,657.00/545.67
  6. Step 6: Final answer
    x = 331.07

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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.