Home / 3,115.81-4,299.82-1,789.60

Finding the Fourth Proportional to 3,115.81, 4,299.82 and 1,789.60

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Solution

The fourth proportional to 3,115.81, 4,299.82 and 1,789.60 is: 2,469.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,115.81 : 4,299.82 = 1,789.60 : x
  2. Step 2: Convert to fraction form
    3,115.81/4,299.82 = 1,789.60/x
  3. Step 3: Cross multiply
    3,115.81x = 4,299.82 × 1,789.60
  4. Step 4: Simplify right side
    3,115.81x = 7,694,957.87
  5. Step 5: Solve for x
    x = 7,694,957.87/3,115.81
  6. Step 6: Final answer
    x = 2,469.65

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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.