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Finding the Fourth Proportional to 3,491.82, 4,818.61 and 1,919.91

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Solution

The fourth proportional to 3,491.82, 4,818.61 and 1,919.91 is: 2,649.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,491.82 : 4,818.61 = 1,919.91 : x
  2. Step 2: Convert to fraction form
    3,491.82/4,818.61 = 1,919.91/x
  3. Step 3: Cross multiply
    3,491.82x = 4,818.61 × 1,919.91
  4. Step 4: Simplify right side
    3,491.82x = 9,251,292.73
  5. Step 5: Solve for x
    x = 9,251,292.73/3,491.82
  6. Step 6: Final answer
    x = 2,649.42

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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.