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Finding the Fourth Proportional to 2,843.21, 3,923.64 and 1,723.86

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Solution

The fourth proportional to 2,843.21, 3,923.64 and 1,723.86 is: 2,378.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,843.21 : 3,923.64 = 1,723.86 : x
  2. Step 2: Convert to fraction form
    2,843.21/3,923.64 = 1,723.86/x
  3. Step 3: Cross multiply
    2,843.21x = 3,923.64 × 1,723.86
  4. Step 4: Simplify right side
    2,843.21x = 6,763,806.05
  5. Step 5: Solve for x
    x = 6,763,806.05/2,843.21
  6. Step 6: Final answer
    x = 2,378.93

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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.