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Finding the Fourth Proportional to 3,246.60, 4,480.39 and 1,919.82

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Solution

The fourth proportional to 3,246.60, 4,480.39 and 1,919.82 is: 2,649.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,246.60 : 4,480.39 = 1,919.82 : x
  2. Step 2: Convert to fraction form
    3,246.60/4,480.39 = 1,919.82/x
  3. Step 3: Cross multiply
    3,246.60x = 4,480.39 × 1,919.82
  4. Step 4: Simplify right side
    3,246.60x = 8,601,542.33
  5. Step 5: Solve for x
    x = 8,601,542.33/3,246.60
  6. Step 6: Final answer
    x = 2,649.40

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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.