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Finding the Fourth Proportional to 545.67, 817.84 and 252.78

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Solution

The fourth proportional to 545.67, 817.84 and 252.78 is: 378.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    545.67 : 817.84 = 252.78 : x
  2. Step 2: Convert to fraction form
    545.67/817.84 = 252.78/x
  3. Step 3: Cross multiply
    545.67x = 817.84 × 252.78
  4. Step 4: Simplify right side
    545.67x = 206,733.60
  5. Step 5: Solve for x
    x = 206,733.60/545.67
  6. Step 6: Final answer
    x = 378.86

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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.