Home / 3,120.39-4,680.59-1,271.09

Finding the Fourth Proportional to 3,120.39, 4,680.59 and 1,271.09

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Solution

The fourth proportional to 3,120.39, 4,680.59 and 1,271.09 is: 1,906.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.39 : 4,680.59 = 1,271.09 : x
  2. Step 2: Convert to fraction form
    3,120.39/4,680.59 = 1,271.09/x
  3. Step 3: Cross multiply
    3,120.39x = 4,680.59 × 1,271.09
  4. Step 4: Simplify right side
    3,120.39x = 5,949,456.49
  5. Step 5: Solve for x
    x = 5,949,456.49/3,120.39
  6. Step 6: Final answer
    x = 1,906.64

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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.