Home / 4,081.20-6,121.78-1,003.20

Finding the Fourth Proportional to 4,081.20, 6,121.78 and 1,003.20

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Solution

The fourth proportional to 4,081.20, 6,121.78 and 1,003.20 is: 1,504.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,081.20 : 6,121.78 = 1,003.20 : x
  2. Step 2: Convert to fraction form
    4,081.20/6,121.78 = 1,003.20/x
  3. Step 3: Cross multiply
    4,081.20x = 6,121.78 × 1,003.20
  4. Step 4: Simplify right side
    4,081.20x = 6,141,369.70
  5. Step 5: Solve for x
    x = 6,141,369.70/4,081.20
  6. Step 6: Final answer
    x = 1,504.80

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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.