Home / 3,820.40-5,723.40-1,965.20

Finding the Fourth Proportional to 3,820.40, 5,723.40 and 1,965.20

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Solution

The fourth proportional to 3,820.40, 5,723.40 and 1,965.20 is: 2,944.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,820.40 : 5,723.40 = 1,965.20 : x
  2. Step 2: Convert to fraction form
    3,820.40/5,723.40 = 1,965.20/x
  3. Step 3: Cross multiply
    3,820.40x = 5,723.40 × 1,965.20
  4. Step 4: Simplify right side
    3,820.40x = 11,247,625.68
  5. Step 5: Solve for x
    x = 11,247,625.68/3,820.40
  6. Step 6: Final answer
    x = 2,944.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.