Home / 2,819.21-4,228.81-1,279.13

Finding the Fourth Proportional to 2,819.21, 4,228.81 and 1,279.13

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Solution

The fourth proportional to 2,819.21, 4,228.81 and 1,279.13 is: 1,918.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,819.21 : 4,228.81 = 1,279.13 : x
  2. Step 2: Convert to fraction form
    2,819.21/4,228.81 = 1,279.13/x
  3. Step 3: Cross multiply
    2,819.21x = 4,228.81 × 1,279.13
  4. Step 4: Simplify right side
    2,819.21x = 5,409,173.39
  5. Step 5: Solve for x
    x = 5,409,173.39/2,819.21
  6. Step 6: Final answer
    x = 1,918.69

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.