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Finding the Fourth Proportional to 3,993.59, 5,991.39 and 1,220.15

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Solution

The fourth proportional to 3,993.59, 5,991.39 and 1,220.15 is: 1,830.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,993.59 : 5,991.39 = 1,220.15 : x
  2. Step 2: Convert to fraction form
    3,993.59/5,991.39 = 1,220.15/x
  3. Step 3: Cross multiply
    3,993.59x = 5,991.39 × 1,220.15
  4. Step 4: Simplify right side
    3,993.59x = 7,310,364.55
  5. Step 5: Solve for x
    x = 7,310,364.55/3,993.59
  6. Step 6: Final answer
    x = 1,830.53

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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.