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Finding the Fourth Proportional to 3,993.22, 5,989.74 and 1,800.40

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Solution

The fourth proportional to 3,993.22, 5,989.74 and 1,800.40 is: 2,700.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,993.22 : 5,989.74 = 1,800.40 : x
  2. Step 2: Convert to fraction form
    3,993.22/5,989.74 = 1,800.40/x
  3. Step 3: Cross multiply
    3,993.22x = 5,989.74 × 1,800.40
  4. Step 4: Simplify right side
    3,993.22x = 10,783,927.90
  5. Step 5: Solve for x
    x = 10,783,927.90/3,993.22
  6. Step 6: Final answer
    x = 2,700.56

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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.