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Finding the Fourth Proportional to 545.52, 818.43 and 408.83

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Solution

The fourth proportional to 545.52, 818.43 and 408.83 is: 613.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    545.52 : 818.43 = 408.83 : x
  2. Step 2: Convert to fraction form
    545.52/818.43 = 408.83/x
  3. Step 3: Cross multiply
    545.52x = 818.43 × 408.83
  4. Step 4: Simplify right side
    545.52x = 334,594.64
  5. Step 5: Solve for x
    x = 334,594.64/545.52
  6. Step 6: Final answer
    x = 613.35

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.