Home / 3,121.39-4,682.36-1,272.64

Finding the Fourth Proportional to 3,121.39, 4,682.36 and 1,272.64

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Solution

The fourth proportional to 3,121.39, 4,682.36 and 1,272.64 is: 1,909.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.39 : 4,682.36 = 1,272.64 : x
  2. Step 2: Convert to fraction form
    3,121.39/4,682.36 = 1,272.64/x
  3. Step 3: Cross multiply
    3,121.39x = 4,682.36 × 1,272.64
  4. Step 4: Simplify right side
    3,121.39x = 5,958,928.86
  5. Step 5: Solve for x
    x = 5,958,928.86/3,121.39
  6. Step 6: Final answer
    x = 1,909.06

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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.