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Finding the Fourth Proportional to 3,099.48, 4,278.12 and 1,919.91

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Solution

The fourth proportional to 3,099.48, 4,278.12 and 1,919.91 is: 2,649.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,099.48 : 4,278.12 = 1,919.91 : x
  2. Step 2: Convert to fraction form
    3,099.48/4,278.12 = 1,919.91/x
  3. Step 3: Cross multiply
    3,099.48x = 4,278.12 × 1,919.91
  4. Step 4: Simplify right side
    3,099.48x = 8,213,605.37
  5. Step 5: Solve for x
    x = 8,213,605.37/3,099.48
  6. Step 6: Final answer
    x = 2,649.99

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1.5x scale

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.