Home / 3,221.26-4,445.74-1,805.20

Finding the Fourth Proportional to 3,221.26, 4,445.74 and 1,805.20

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Solution

The fourth proportional to 3,221.26, 4,445.74 and 1,805.20 is: 2,491.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,221.26 : 4,445.74 = 1,805.20 : x
  2. Step 2: Convert to fraction form
    3,221.26/4,445.74 = 1,805.20/x
  3. Step 3: Cross multiply
    3,221.26x = 4,445.74 × 1,805.20
  4. Step 4: Simplify right side
    3,221.26x = 8,025,449.85
  5. Step 5: Solve for x
    x = 8,025,449.85/3,221.26
  6. Step 6: Final answer
    x = 2,491.40

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Half scale
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Double 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.