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Finding the Fourth Proportional to 3,993.48, 5,990.28 and 1,072.20

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Solution

The fourth proportional to 3,993.48, 5,990.28 and 1,072.20 is: 1,608.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,993.48 : 5,990.28 = 1,072.20 : x
  2. Step 2: Convert to fraction form
    3,993.48/5,990.28 = 1,072.20/x
  3. Step 3: Cross multiply
    3,993.48x = 5,990.28 × 1,072.20
  4. Step 4: Simplify right side
    3,993.48x = 6,422,778.22
  5. Step 5: Solve for x
    x = 6,422,778.22/3,993.48
  6. Step 6: Final answer
    x = 1,608.32

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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.