Home / 3,115.76-4,299.27-1,789.21

Finding the Fourth Proportional to 3,115.76, 4,299.27 and 1,789.21

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Solution

The fourth proportional to 3,115.76, 4,299.27 and 1,789.21 is: 2,468.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,115.76 : 4,299.27 = 1,789.21 : x
  2. Step 2: Convert to fraction form
    3,115.76/4,299.27 = 1,789.21/x
  3. Step 3: Cross multiply
    3,115.76x = 4,299.27 × 1,789.21
  4. Step 4: Simplify right side
    3,115.76x = 7,692,296.88
  5. Step 5: Solve for x
    x = 7,692,296.88/3,115.76
  6. Step 6: Final answer
    x = 2,468.83

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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.