Home / 3,856.93-5,784.20-1,391.43

Finding the Fourth Proportional to 3,856.93, 5,784.20 and 1,391.43

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Solution

The fourth proportional to 3,856.93, 5,784.20 and 1,391.43 is: 2,086.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,856.93 : 5,784.20 = 1,391.43 : x
  2. Step 2: Convert to fraction form
    3,856.93/5,784.20 = 1,391.43/x
  3. Step 3: Cross multiply
    3,856.93x = 5,784.20 × 1,391.43
  4. Step 4: Simplify right side
    3,856.93x = 8,048,318.96
  5. Step 5: Solve for x
    x = 8,048,318.96/3,856.93
  6. Step 6: Final answer
    x = 2,086.71

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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.