Home / 3,115.25-4,299.85-1,789.68

Finding the Fourth Proportional to 3,115.25, 4,299.85 and 1,789.68

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Solution

The fourth proportional to 3,115.25, 4,299.85 and 1,789.68 is: 2,470.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,115.25 : 4,299.85 = 1,789.68 : x
  2. Step 2: Convert to fraction form
    3,115.25/4,299.85 = 1,789.68/x
  3. Step 3: Cross multiply
    3,115.25x = 4,299.85 × 1,789.68
  4. Step 4: Simplify right side
    3,115.25x = 7,695,355.55
  5. Step 5: Solve for x
    x = 7,695,355.55/3,115.25
  6. Step 6: Final answer
    x = 2,470.22

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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.