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Finding the Fourth Proportional to 545.73, 818.61 and 285.36

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Solution

The fourth proportional to 545.73, 818.61 and 285.36 is: 428.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    545.73 : 818.61 = 285.36 : x
  2. Step 2: Convert to fraction form
    545.73/818.61 = 285.36/x
  3. Step 3: Cross multiply
    545.73x = 818.61 × 285.36
  4. Step 4: Simplify right side
    545.73x = 233,598.55
  5. Step 5: Solve for x
    x = 233,598.55/545.73
  6. Step 6: Final answer
    x = 428.05

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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.