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Finding the Fourth Proportional to 545.84, 818.92 and 221.04

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Solution

The fourth proportional to 545.84, 818.92 and 221.04 is: 331.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    545.84 : 818.92 = 221.04 : x
  2. Step 2: Convert to fraction form
    545.84/818.92 = 221.04/x
  3. Step 3: Cross multiply
    545.84x = 818.92 × 221.04
  4. Step 4: Simplify right side
    545.84x = 181,014.08
  5. Step 5: Solve for x
    x = 181,014.08/545.84
  6. Step 6: Final answer
    x = 331.62

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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.