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Finding the Fourth Proportional to 3,853.41, 5,784.90 and 2,690.81

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Solution

The fourth proportional to 3,853.41, 5,784.90 and 2,690.81 is: 4,039.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,853.41 : 5,784.90 = 2,690.81 : x
  2. Step 2: Convert to fraction form
    3,853.41/5,784.90 = 2,690.81/x
  3. Step 3: Cross multiply
    3,853.41x = 5,784.90 × 2,690.81
  4. Step 4: Simplify right side
    3,853.41x = 15,566,037.84
  5. Step 5: Solve for x
    x = 15,566,037.84/3,853.41
  6. Step 6: Final answer
    x = 4,039.55

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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.