Home / 2,079.20-3,114.60-1,296.80

Finding the Fourth Proportional to 2,079.20, 3,114.60 and 1,296.80

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Solution

The fourth proportional to 2,079.20, 3,114.60 and 1,296.80 is: 1,942.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,079.20 : 3,114.60 = 1,296.80 : x
  2. Step 2: Convert to fraction form
    2,079.20/3,114.60 = 1,296.80/x
  3. Step 3: Cross multiply
    2,079.20x = 3,114.60 × 1,296.80
  4. Step 4: Simplify right side
    2,079.20x = 4,039,013.28
  5. Step 5: Solve for x
    x = 4,039,013.28/2,079.20
  6. Step 6: Final answer
    x = 1,942.58

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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.