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Finding the Fourth Proportional to 3,993.88, 5,991.06 and 1,220.74

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Solution

The fourth proportional to 3,993.88, 5,991.06 and 1,220.74 is: 1,831.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,993.88 : 5,991.06 = 1,220.74 : x
  2. Step 2: Convert to fraction form
    3,993.88/5,991.06 = 1,220.74/x
  3. Step 3: Cross multiply
    3,993.88x = 5,991.06 × 1,220.74
  4. Step 4: Simplify right side
    3,993.88x = 7,313,526.58
  5. Step 5: Solve for x
    x = 7,313,526.58/3,993.88
  6. Step 6: Final answer
    x = 1,831.18

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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.