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Finding the Fourth Proportional to 545.61, 818.04 and 220.68

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Solution

The fourth proportional to 545.61, 818.04 and 220.68 is: 330.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    545.61 : 818.04 = 220.68 : x
  2. Step 2: Convert to fraction form
    545.61/818.04 = 220.68/x
  3. Step 3: Cross multiply
    545.61x = 818.04 × 220.68
  4. Step 4: Simplify right side
    545.61x = 180,525.07
  5. Step 5: Solve for x
    x = 180,525.07/545.61
  6. Step 6: Final answer
    x = 330.87

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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.