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Finding the Fourth Proportional to 545.77, 818.69 and 155.80

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Solution

The fourth proportional to 545.77, 818.69 and 155.80 is: 233.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    545.77 : 818.69 = 155.80 : x
  2. Step 2: Convert to fraction form
    545.77/818.69 = 155.80/x
  3. Step 3: Cross multiply
    545.77x = 818.69 × 155.80
  4. Step 4: Simplify right side
    545.77x = 127,551.44
  5. Step 5: Solve for x
    x = 127,551.44/545.77
  6. Step 6: Final answer
    x = 233.71

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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.