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Finding the Fourth Proportional to 545.49, 818.33 and 220.88

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Solution

The fourth proportional to 545.49, 818.33 and 220.88 is: 331.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    545.49 : 818.33 = 220.88 : x
  2. Step 2: Convert to fraction form
    545.49/818.33 = 220.88/x
  3. Step 3: Cross multiply
    545.49x = 818.33 × 220.88
  4. Step 4: Simplify right side
    545.49x = 180,747.53
  5. Step 5: Solve for x
    x = 180,747.53/545.49
  6. Step 6: Final answer
    x = 331.35

Related Problems

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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.