Home / 2,857.52-4,279.56-1,392.08

Finding the Fourth Proportional to 2,857.52, 4,279.56 and 1,392.08

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Solution

The fourth proportional to 2,857.52, 4,279.56 and 1,392.08 is: 2,084.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,857.52 : 4,279.56 = 1,392.08 : x
  2. Step 2: Convert to fraction form
    2,857.52/4,279.56 = 1,392.08/x
  3. Step 3: Cross multiply
    2,857.52x = 4,279.56 × 1,392.08
  4. Step 4: Simplify right side
    2,857.52x = 5,957,489.88
  5. Step 5: Solve for x
    x = 5,957,489.88/2,857.52
  6. Step 6: Final answer
    x = 2,084.85

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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.