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Finding the Fourth Proportional to 2,188.82, 3,283.20 and 545.38

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Solution

The fourth proportional to 2,188.82, 3,283.20 and 545.38 is: 818.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,188.82 : 3,283.20 = 545.38 : x
  2. Step 2: Convert to fraction form
    2,188.82/3,283.20 = 545.38/x
  3. Step 3: Cross multiply
    2,188.82x = 3,283.20 × 545.38
  4. Step 4: Simplify right side
    2,188.82x = 1,790,601.88
  5. Step 5: Solve for x
    x = 1,790,601.88/2,188.82
  6. Step 6: Final answer
    x = 818.07

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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.