Home / 3,121.19-4,684.62-1,661.57

Finding the Fourth Proportional to 3,121.19, 4,684.62 and 1,661.57

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Solution

The fourth proportional to 3,121.19, 4,684.62 and 1,661.57 is: 2,493.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.19 : 4,684.62 = 1,661.57 : x
  2. Step 2: Convert to fraction form
    3,121.19/4,684.62 = 1,661.57/x
  3. Step 3: Cross multiply
    3,121.19x = 4,684.62 × 1,661.57
  4. Step 4: Simplify right side
    3,121.19x = 7,783,824.05
  5. Step 5: Solve for x
    x = 7,783,824.05/3,121.19
  6. Step 6: Final answer
    x = 2,493.86

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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.