Home / 2,138.57-3,203.70-1,211.27

Finding the Fourth Proportional to 2,138.57, 3,203.70 and 1,211.27

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Solution

The fourth proportional to 2,138.57, 3,203.70 and 1,211.27 is: 1,814.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,138.57 : 3,203.70 = 1,211.27 : x
  2. Step 2: Convert to fraction form
    2,138.57/3,203.70 = 1,211.27/x
  3. Step 3: Cross multiply
    2,138.57x = 3,203.70 × 1,211.27
  4. Step 4: Simplify right side
    2,138.57x = 3,880,545.70
  5. Step 5: Solve for x
    x = 3,880,545.70/2,138.57
  6. Step 6: Final answer
    x = 1,814.55

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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.