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Finding the Fourth Proportional to 545.88, 818.10 and 221.49

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Solution

The fourth proportional to 545.88, 818.10 and 221.49 is: 331.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    545.88 : 818.10 = 221.49 : x
  2. Step 2: Convert to fraction form
    545.88/818.10 = 221.49/x
  3. Step 3: Cross multiply
    545.88x = 818.10 × 221.49
  4. Step 4: Simplify right side
    545.88x = 181,200.97
  5. Step 5: Solve for x
    x = 181,200.97/545.88
  6. Step 6: Final answer
    x = 331.94

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Double scale
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Similar ratio
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1.5x scale

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.