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Finding the Fourth Proportional to 2,768.94, 3,818.46 and 2,138.46

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Solution

The fourth proportional to 2,768.94, 3,818.46 and 2,138.46 is: 2,949.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,768.94 : 3,818.46 = 2,138.46 : x
  2. Step 2: Convert to fraction form
    2,768.94/3,818.46 = 2,138.46/x
  3. Step 3: Cross multiply
    2,768.94x = 3,818.46 × 2,138.46
  4. Step 4: Simplify right side
    2,768.94x = 8,165,623.97
  5. Step 5: Solve for x
    x = 8,165,623.97/2,768.94
  6. Step 6: Final answer
    x = 2,949.01

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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.