Home / 2,780.33-3,836.79-1,785.78

Finding the Fourth Proportional to 2,780.33, 3,836.79 and 1,785.78

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Solution

The fourth proportional to 2,780.33, 3,836.79 and 1,785.78 is: 2,464.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,780.33 : 3,836.79 = 1,785.78 : x
  2. Step 2: Convert to fraction form
    2,780.33/3,836.79 = 1,785.78/x
  3. Step 3: Cross multiply
    2,780.33x = 3,836.79 × 1,785.78
  4. Step 4: Simplify right side
    2,780.33x = 6,851,662.85
  5. Step 5: Solve for x
    x = 6,851,662.85/2,780.33
  6. Step 6: Final answer
    x = 2,464.34

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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.