Home / 2,082.78-2,874.20-1,138.55

Finding the Fourth Proportional to 2,082.78, 2,874.20 and 1,138.55

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Solution

The fourth proportional to 2,082.78, 2,874.20 and 1,138.55 is: 1,571.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,082.78 : 2,874.20 = 1,138.55 : x
  2. Step 2: Convert to fraction form
    2,082.78/2,874.20 = 1,138.55/x
  3. Step 3: Cross multiply
    2,082.78x = 2,874.20 × 1,138.55
  4. Step 4: Simplify right side
    2,082.78x = 3,272,400.35
  5. Step 5: Solve for x
    x = 3,272,400.35/2,082.78
  6. Step 6: Final answer
    x = 1,571.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.