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Finding the Fourth Proportional to 545.28, 818.46 and 271.55

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Solution

The fourth proportional to 545.28, 818.46 and 271.55 is: 407.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    545.28 : 818.46 = 271.55 : x
  2. Step 2: Convert to fraction form
    545.28/818.46 = 271.55/x
  3. Step 3: Cross multiply
    545.28x = 818.46 × 271.55
  4. Step 4: Simplify right side
    545.28x = 222,248.72
  5. Step 5: Solve for x
    x = 222,248.72/545.28
  6. Step 6: Final answer
    x = 407.59

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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.