Home / 2,639.25-3,640.19-2,221.83

Finding the Fourth Proportional to 2,639.25, 3,640.19 and 2,221.83

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Solution

The fourth proportional to 2,639.25, 3,640.19 and 2,221.83 is: 3,064.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,639.25 : 3,640.19 = 2,221.83 : x
  2. Step 2: Convert to fraction form
    2,639.25/3,640.19 = 2,221.83/x
  3. Step 3: Cross multiply
    2,639.25x = 3,640.19 × 2,221.83
  4. Step 4: Simplify right side
    2,639.25x = 8,087,872.24
  5. Step 5: Solve for x
    x = 8,087,872.24/2,639.25
  6. Step 6: Final answer
    x = 3,064.46

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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.