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Finding the Fourth Proportional to 3,994.08, 5,992.10 and 1,220.80

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Solution

The fourth proportional to 3,994.08, 5,992.10 and 1,220.80 is: 1,831.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,994.08 : 5,992.10 = 1,220.80 : x
  2. Step 2: Convert to fraction form
    3,994.08/5,992.10 = 1,220.80/x
  3. Step 3: Cross multiply
    3,994.08x = 5,992.10 × 1,220.80
  4. Step 4: Simplify right side
    3,994.08x = 7,315,155.68
  5. Step 5: Solve for x
    x = 7,315,155.68/3,994.08
  6. Step 6: Final answer
    x = 1,831.50

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Double scale
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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.