Home / 3,979.42-5,490.66-2,782.92

Finding the Fourth Proportional to 3,979.42, 5,490.66 and 2,782.92

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Solution

The fourth proportional to 3,979.42, 5,490.66 and 2,782.92 is: 3,839.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979.42 : 5,490.66 = 2,782.92 : x
  2. Step 2: Convert to fraction form
    3,979.42/5,490.66 = 2,782.92/x
  3. Step 3: Cross multiply
    3,979.42x = 5,490.66 × 2,782.92
  4. Step 4: Simplify right side
    3,979.42x = 15,280,067.53
  5. Step 5: Solve for x
    x = 15,280,067.53/3,979.42
  6. Step 6: Final answer
    x = 3,839.77

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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.