Home / 2,079.85-3,119.52-1,299.92

Finding the Fourth Proportional to 2,079.85, 3,119.52 and 1,299.92

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Solution

The fourth proportional to 2,079.85, 3,119.52 and 1,299.92 is: 1,949.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,079.85 : 3,119.52 = 1,299.92 : x
  2. Step 2: Convert to fraction form
    2,079.85/3,119.52 = 1,299.92/x
  3. Step 3: Cross multiply
    2,079.85x = 3,119.52 × 1,299.92
  4. Step 4: Simplify right side
    2,079.85x = 4,055,126.44
  5. Step 5: Solve for x
    x = 4,055,126.44/2,079.85
  6. Step 6: Final answer
    x = 1,949.72

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Double scale
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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.