Home / 3,175.20-4,382.91-1,979.64

Finding the Fourth Proportional to 3,175.20, 4,382.91 and 1,979.64

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Solution

The fourth proportional to 3,175.20, 4,382.91 and 1,979.64 is: 2,732.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,175.20 : 4,382.91 = 1,979.64 : x
  2. Step 2: Convert to fraction form
    3,175.20/4,382.91 = 1,979.64/x
  3. Step 3: Cross multiply
    3,175.20x = 4,382.91 × 1,979.64
  4. Step 4: Simplify right side
    3,175.20x = 8,676,583.95
  5. Step 5: Solve for x
    x = 8,676,583.95/3,175.20
  6. Step 6: Final answer
    x = 2,732.61

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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.