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Finding the Fourth Proportional to 2,072.52, 3,107.70 and 838.80

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Solution

The fourth proportional to 2,072.52, 3,107.70 and 838.80 is: 1,257.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,072.52 : 3,107.70 = 838.80 : x
  2. Step 2: Convert to fraction form
    2,072.52/3,107.70 = 838.80/x
  3. Step 3: Cross multiply
    2,072.52x = 3,107.70 × 838.80
  4. Step 4: Simplify right side
    2,072.52x = 2,606,738.76
  5. Step 5: Solve for x
    x = 2,606,738.76/2,072.52
  6. Step 6: Final answer
    x = 1,257.76

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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.