Home / 2,520.03-3,780.44-1,286.78

Finding the Fourth Proportional to 2,520.03, 3,780.44 and 1,286.78

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Solution

The fourth proportional to 2,520.03, 3,780.44 and 1,286.78 is: 1,930.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,520.03 : 3,780.44 = 1,286.78 : x
  2. Step 2: Convert to fraction form
    2,520.03/3,780.44 = 1,286.78/x
  3. Step 3: Cross multiply
    2,520.03x = 3,780.44 × 1,286.78
  4. Step 4: Simplify right side
    2,520.03x = 4,864,575.68
  5. Step 5: Solve for x
    x = 4,864,575.68/2,520.03
  6. Step 6: Final answer
    x = 1,930.36

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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.