Home / 3,121.39-4,690.59-1,661.59

Finding the Fourth Proportional to 3,121.39, 4,690.59 and 1,661.59

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Solution

The fourth proportional to 3,121.39, 4,690.59 and 1,661.59 is: 2,496.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.39 : 4,690.59 = 1,661.59 : x
  2. Step 2: Convert to fraction form
    3,121.39/4,690.59 = 1,661.59/x
  3. Step 3: Cross multiply
    3,121.39x = 4,690.59 × 1,661.59
  4. Step 4: Simplify right side
    3,121.39x = 7,793,837.44
  5. Step 5: Solve for x
    x = 7,793,837.44/3,121.39
  6. Step 6: Final answer
    x = 2,496.91

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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.