Home / 3,979.20-5,490.36-2,407.24

Finding the Fourth Proportional to 3,979.20, 5,490.36 and 2,407.24

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Solution

The fourth proportional to 3,979.20, 5,490.36 and 2,407.24 is: 3,321.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979.20 : 5,490.36 = 2,407.24 : x
  2. Step 2: Convert to fraction form
    3,979.20/5,490.36 = 2,407.24/x
  3. Step 3: Cross multiply
    3,979.20x = 5,490.36 × 2,407.24
  4. Step 4: Simplify right side
    3,979.20x = 13,216,614.21
  5. Step 5: Solve for x
    x = 13,216,614.21/3,979.20
  6. Step 6: Final answer
    x = 3,321.42

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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.