Home / 2,780.32-3,834.70-1,940.76

Finding the Fourth Proportional to 2,780.32, 3,834.70 and 1,940.76

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Solution

The fourth proportional to 2,780.32, 3,834.70 and 1,940.76 is: 2,676.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,780.32 : 3,834.70 = 1,940.76 : x
  2. Step 2: Convert to fraction form
    2,780.32/3,834.70 = 1,940.76/x
  3. Step 3: Cross multiply
    2,780.32x = 3,834.70 × 1,940.76
  4. Step 4: Simplify right side
    2,780.32x = 7,442,232.37
  5. Step 5: Solve for x
    x = 7,442,232.37/2,780.32
  6. Step 6: Final answer
    x = 2,676.75

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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.