Home / 1,916.12-2,874.28-819.72

Finding the Fourth Proportional to 1,916.12, 2,874.28 and 819.72

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Solution

The fourth proportional to 1,916.12, 2,874.28 and 819.72 is: 1,229.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,916.12 : 2,874.28 = 819.72 : x
  2. Step 2: Convert to fraction form
    1,916.12/2,874.28 = 819.72/x
  3. Step 3: Cross multiply
    1,916.12x = 2,874.28 × 819.72
  4. Step 4: Simplify right side
    1,916.12x = 2,356,104.80
  5. Step 5: Solve for x
    x = 2,356,104.80/1,916.12
  6. Step 6: Final answer
    x = 1,229.62

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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.