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Finding the Fourth Proportional to 1,916.08, 2,871.71 and 819.15

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Solution

The fourth proportional to 1,916.08, 2,871.71 and 819.15 is: 1,227.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,916.08 : 2,871.71 = 819.15 : x
  2. Step 2: Convert to fraction form
    1,916.08/2,871.71 = 819.15/x
  3. Step 3: Cross multiply
    1,916.08x = 2,871.71 × 819.15
  4. Step 4: Simplify right side
    1,916.08x = 2,352,357.15
  5. Step 5: Solve for x
    x = 2,352,357.15/1,916.08
  6. Step 6: Final answer
    x = 1,227.70

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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.