Home / 3,027.28-4,179.78-1,980.76

Finding the Fourth Proportional to 3,027.28, 4,179.78 and 1,980.76

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Solution

The fourth proportional to 3,027.28, 4,179.78 and 1,980.76 is: 2,734.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,027.28 : 4,179.78 = 1,980.76 : x
  2. Step 2: Convert to fraction form
    3,027.28/4,179.78 = 1,980.76/x
  3. Step 3: Cross multiply
    3,027.28x = 4,179.78 × 1,980.76
  4. Step 4: Simplify right side
    3,027.28x = 8,279,141.03
  5. Step 5: Solve for x
    x = 8,279,141.03/3,027.28
  6. Step 6: Final answer
    x = 2,734.84

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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.