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Finding the Fourth Proportional to 1,915.38, 2,873.38 and 819.76

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Solution

The fourth proportional to 1,915.38, 2,873.38 and 819.76 is: 1,229.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,915.38 : 2,873.38 = 819.76 : x
  2. Step 2: Convert to fraction form
    1,915.38/2,873.38 = 819.76/x
  3. Step 3: Cross multiply
    1,915.38x = 2,873.38 × 819.76
  4. Step 4: Simplify right side
    1,915.38x = 2,355,481.99
  5. Step 5: Solve for x
    x = 2,355,481.99/1,915.38
  6. Step 6: Final answer
    x = 1,229.77

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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.