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Finding the Fourth Proportional to 3,690.91, 5,079.90 and 2,942.47

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Solution

The fourth proportional to 3,690.91, 5,079.90 and 2,942.47 is: 4,049.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,690.91 : 5,079.90 = 2,942.47 : x
  2. Step 2: Convert to fraction form
    3,690.91/5,079.90 = 2,942.47/x
  3. Step 3: Cross multiply
    3,690.91x = 5,079.90 × 2,942.47
  4. Step 4: Simplify right side
    3,690.91x = 14,947,453.35
  5. Step 5: Solve for x
    x = 14,947,453.35/3,690.91
  6. Step 6: Final answer
    x = 4,049.80

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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.