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Finding the Fourth Proportional to 3,992.89, 5,989.33 and 1,219.41

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Solution

The fourth proportional to 3,992.89, 5,989.33 and 1,219.41 is: 1,829.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,992.89 : 5,989.33 = 1,219.41 : x
  2. Step 2: Convert to fraction form
    3,992.89/5,989.33 = 1,219.41/x
  3. Step 3: Cross multiply
    3,992.89x = 5,989.33 × 1,219.41
  4. Step 4: Simplify right side
    3,992.89x = 7,303,470.69
  5. Step 5: Solve for x
    x = 7,303,470.69/3,992.89
  6. Step 6: Final answer
    x = 1,829.12

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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.