Home / 3,906.90-5,390.07-2,490.26

Finding the Fourth Proportional to 3,906.90, 5,390.07 and 2,490.26

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Solution

The fourth proportional to 3,906.90, 5,390.07 and 2,490.26 is: 3,435.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,906.90 : 5,390.07 = 2,490.26 : x
  2. Step 2: Convert to fraction form
    3,906.90/5,390.07 = 2,490.26/x
  3. Step 3: Cross multiply
    3,906.90x = 5,390.07 × 2,490.26
  4. Step 4: Simplify right side
    3,906.90x = 13,422,679.09
  5. Step 5: Solve for x
    x = 13,422,679.09/3,906.90
  6. Step 6: Final answer
    x = 3,435.63

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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.