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Finding the Fourth Proportional to 2,649.87, 3,974.85 and 1,479.20

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Solution

The fourth proportional to 2,649.87, 3,974.85 and 1,479.20 is: 2,218.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,649.87 : 3,974.85 = 1,479.20 : x
  2. Step 2: Convert to fraction form
    2,649.87/3,974.85 = 1,479.20/x
  3. Step 3: Cross multiply
    2,649.87x = 3,974.85 × 1,479.20
  4. Step 4: Simplify right side
    2,649.87x = 5,879,578.25
  5. Step 5: Solve for x
    x = 5,879,578.25/2,649.87
  6. Step 6: Final answer
    x = 2,218.82

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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.