Home / 2,788.20-3,855.15-2,438.06

Finding the Fourth Proportional to 2,788.20, 3,855.15 and 2,438.06

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Solution

The fourth proportional to 2,788.20, 3,855.15 and 2,438.06 is: 3,371.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,788.20 : 3,855.15 = 2,438.06 : x
  2. Step 2: Convert to fraction form
    2,788.20/3,855.15 = 2,438.06/x
  3. Step 3: Cross multiply
    2,788.20x = 3,855.15 × 2,438.06
  4. Step 4: Simplify right side
    2,788.20x = 9,399,067.73
  5. Step 5: Solve for x
    x = 9,399,067.73/2,788.20
  6. Step 6: Final answer
    x = 3,371.02

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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.