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Finding the Fourth Proportional to 1,436.99, 2,155.46 and 819.38

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Solution

The fourth proportional to 1,436.99, 2,155.46 and 819.38 is: 1,229.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,436.99 : 2,155.46 = 819.38 : x
  2. Step 2: Convert to fraction form
    1,436.99/2,155.46 = 819.38/x
  3. Step 3: Cross multiply
    1,436.99x = 2,155.46 × 819.38
  4. Step 4: Simplify right side
    1,436.99x = 1,766,125.94
  5. Step 5: Solve for x
    x = 1,766,125.94/1,436.99
  6. Step 6: Final answer
    x = 1,229.05

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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.