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Finding the Fourth Proportional to 1,919.76, 2,650.24 and 1,353.44

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Solution

The fourth proportional to 1,919.76, 2,650.24 and 1,353.44 is: 1,868.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,919.76 : 2,650.24 = 1,353.44 : x
  2. Step 2: Convert to fraction form
    1,919.76/2,650.24 = 1,353.44/x
  3. Step 3: Cross multiply
    1,919.76x = 2,650.24 × 1,353.44
  4. Step 4: Simplify right side
    1,919.76x = 3,586,940.83
  5. Step 5: Solve for x
    x = 3,586,940.83/1,919.76
  6. Step 6: Final answer
    x = 1,868.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.