Home / 3,919.21-5,407.31-2,240.53

Finding the Fourth Proportional to 3,919.21, 5,407.31 and 2,240.53

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Solution

The fourth proportional to 3,919.21, 5,407.31 and 2,240.53 is: 3,091.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,919.21 : 5,407.31 = 2,240.53 : x
  2. Step 2: Convert to fraction form
    3,919.21/5,407.31 = 2,240.53/x
  3. Step 3: Cross multiply
    3,919.21x = 5,407.31 × 2,240.53
  4. Step 4: Simplify right side
    3,919.21x = 12,115,232.36
  5. Step 5: Solve for x
    x = 12,115,232.36/3,919.21
  6. Step 6: Final answer
    x = 3,091.25

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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.