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Finding the Fourth Proportional to 3,994.30, 5,991.33 and 1,220.86

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Solution

The fourth proportional to 3,994.30, 5,991.33 and 1,220.86 is: 1,831.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,994.30 : 5,991.33 = 1,220.86 : x
  2. Step 2: Convert to fraction form
    3,994.30/5,991.33 = 1,220.86/x
  3. Step 3: Cross multiply
    3,994.30x = 5,991.33 × 1,220.86
  4. Step 4: Simplify right side
    3,994.30x = 7,314,575.14
  5. Step 5: Solve for x
    x = 7,314,575.14/3,994.30
  6. Step 6: Final answer
    x = 1,831.25

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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.