Home / 3,128.74-4,694.82-1,279.42

Finding the Fourth Proportional to 3,128.74, 4,694.82 and 1,279.42

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Solution

The fourth proportional to 3,128.74, 4,694.82 and 1,279.42 is: 1,919.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.74 : 4,694.82 = 1,279.42 : x
  2. Step 2: Convert to fraction form
    3,128.74/4,694.82 = 1,279.42/x
  3. Step 3: Cross multiply
    3,128.74x = 4,694.82 × 1,279.42
  4. Step 4: Simplify right side
    3,128.74x = 6,006,646.60
  5. Step 5: Solve for x
    x = 6,006,646.60/3,128.74
  6. Step 6: Final answer
    x = 1,919.83

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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.