Home / 3,120.74-4,299.91-2,280.56

Finding the Fourth Proportional to 3,120.74, 4,299.91 and 2,280.56

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Solution

The fourth proportional to 3,120.74, 4,299.91 and 2,280.56 is: 3,142.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.74 : 4,299.91 = 2,280.56 : x
  2. Step 2: Convert to fraction form
    3,120.74/4,299.91 = 2,280.56/x
  3. Step 3: Cross multiply
    3,120.74x = 4,299.91 × 2,280.56
  4. Step 4: Simplify right side
    3,120.74x = 9,806,207.80
  5. Step 5: Solve for x
    x = 9,806,207.80/3,120.74
  6. Step 6: Final answer
    x = 3,142.28

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Half scale
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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.