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Finding the Fourth Proportional to 3,994.72, 5,991.84 and 1,221.32

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Solution

The fourth proportional to 3,994.72, 5,991.84 and 1,221.32 is: 1,831.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,994.72 : 5,991.84 = 1,221.32 : x
  2. Step 2: Convert to fraction form
    3,994.72/5,991.84 = 1,221.32/x
  3. Step 3: Cross multiply
    3,994.72x = 5,991.84 × 1,221.32
  4. Step 4: Simplify right side
    3,994.72x = 7,317,954.03
  5. Step 5: Solve for x
    x = 7,317,954.03/3,994.72
  6. Step 6: Final answer
    x = 1,831.91

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Similar ratio
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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.