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Finding the Fourth Proportional to 1,743.70, 2,616.20 and 819.56

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Solution

The fourth proportional to 1,743.70, 2,616.20 and 819.56 is: 1,229.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,743.70 : 2,616.20 = 819.56 : x
  2. Step 2: Convert to fraction form
    1,743.70/2,616.20 = 819.56/x
  3. Step 3: Cross multiply
    1,743.70x = 2,616.20 × 819.56
  4. Step 4: Simplify right side
    1,743.70x = 2,144,132.87
  5. Step 5: Solve for x
    x = 2,144,132.87/1,743.70
  6. Step 6: Final answer
    x = 1,229.65

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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.