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Finding the Fourth Proportional to 1,889.42, 2,819.07 and 1,691.24

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Solution

The fourth proportional to 1,889.42, 2,819.07 and 1,691.24 is: 2,523.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,889.42 : 2,819.07 = 1,691.24 : x
  2. Step 2: Convert to fraction form
    1,889.42/2,819.07 = 1,691.24/x
  3. Step 3: Cross multiply
    1,889.42x = 2,819.07 × 1,691.24
  4. Step 4: Simplify right side
    1,889.42x = 4,767,709.85
  5. Step 5: Solve for x
    x = 4,767,709.85/1,889.42
  6. Step 6: Final answer
    x = 2,523.38

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.