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Finding the Fourth Proportional to 3,993.76, 5,990.68 and 1,396.72

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Solution

The fourth proportional to 3,993.76, 5,990.68 and 1,396.72 is: 2,095.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,993.76 : 5,990.68 = 1,396.72 : x
  2. Step 2: Convert to fraction form
    3,993.76/5,990.68 = 1,396.72/x
  3. Step 3: Cross multiply
    3,993.76x = 5,990.68 × 1,396.72
  4. Step 4: Simplify right side
    3,993.76x = 8,367,302.57
  5. Step 5: Solve for x
    x = 8,367,302.57/3,993.76
  6. Step 6: Final answer
    x = 2,095.09

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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.