Home / 3,221.19-4,445.60-1,805.11

Finding the Fourth Proportional to 3,221.19, 4,445.60 and 1,805.11

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Solution

The fourth proportional to 3,221.19, 4,445.60 and 1,805.11 is: 2,491.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,221.19 : 4,445.60 = 1,805.11 : x
  2. Step 2: Convert to fraction form
    3,221.19/4,445.60 = 1,805.11/x
  3. Step 3: Cross multiply
    3,221.19x = 4,445.60 × 1,805.11
  4. Step 4: Simplify right side
    3,221.19x = 8,024,797.02
  5. Step 5: Solve for x
    x = 8,024,797.02/3,221.19
  6. Step 6: Final answer
    x = 2,491.25

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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.