Home / 2,217.72-3,323.68-1,121.49

Finding the Fourth Proportional to 2,217.72, 3,323.68 and 1,121.49

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Solution

The fourth proportional to 2,217.72, 3,323.68 and 1,121.49 is: 1,680.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,217.72 : 3,323.68 = 1,121.49 : x
  2. Step 2: Convert to fraction form
    2,217.72/3,323.68 = 1,121.49/x
  3. Step 3: Cross multiply
    2,217.72x = 3,323.68 × 1,121.49
  4. Step 4: Simplify right side
    2,217.72x = 3,727,473.88
  5. Step 5: Solve for x
    x = 3,727,473.88/2,217.72
  6. Step 6: Final answer
    x = 1,680.77

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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.