Home / 3,971.32-5,480.40-2,399.11

Finding the Fourth Proportional to 3,971.32, 5,480.40 and 2,399.11

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Solution

The fourth proportional to 3,971.32, 5,480.40 and 2,399.11 is: 3,310.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,971.32 : 5,480.40 = 2,399.11 : x
  2. Step 2: Convert to fraction form
    3,971.32/5,480.40 = 2,399.11/x
  3. Step 3: Cross multiply
    3,971.32x = 5,480.40 × 2,399.11
  4. Step 4: Simplify right side
    3,971.32x = 13,148,082.44
  5. Step 5: Solve for x
    x = 13,148,082.44/3,971.32
  6. Step 6: Final answer
    x = 3,310.76

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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.