Home / 3,120.91-4,305.36-2,280.22

Finding the Fourth Proportional to 3,120.91, 4,305.36 and 2,280.22

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Solution

The fourth proportional to 3,120.91, 4,305.36 and 2,280.22 is: 3,145.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.91 : 4,305.36 = 2,280.22 : x
  2. Step 2: Convert to fraction form
    3,120.91/4,305.36 = 2,280.22/x
  3. Step 3: Cross multiply
    3,120.91x = 4,305.36 × 2,280.22
  4. Step 4: Simplify right side
    3,120.91x = 9,817,167.98
  5. Step 5: Solve for x
    x = 9,817,167.98/3,120.91
  6. Step 6: Final answer
    x = 3,145.61

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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.