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Finding the Fourth Proportional to 545.89, 818.83 and 253.30

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Solution

The fourth proportional to 545.89, 818.83 and 253.30 is: 379.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    545.89 : 818.83 = 253.30 : x
  2. Step 2: Convert to fraction form
    545.89/818.83 = 253.30/x
  3. Step 3: Cross multiply
    545.89x = 818.83 × 253.30
  4. Step 4: Simplify right side
    545.89x = 207,409.64
  5. Step 5: Solve for x
    x = 207,409.64/545.89
  6. Step 6: Final answer
    x = 379.95

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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.