Home / 2,843.20-3,920.64-2,528.80

Finding the Fourth Proportional to 2,843.20, 3,920.64 and 2,528.80

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Solution

The fourth proportional to 2,843.20, 3,920.64 and 2,528.80 is: 3,487.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,843.20 : 3,920.64 = 2,528.80 : x
  2. Step 2: Convert to fraction form
    2,843.20/3,920.64 = 2,528.80/x
  3. Step 3: Cross multiply
    2,843.20x = 3,920.64 × 2,528.80
  4. Step 4: Simplify right side
    2,843.20x = 9,914,514.43
  5. Step 5: Solve for x
    x = 9,914,514.43/2,843.20
  6. Step 6: Final answer
    x = 3,487.10

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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.