Home / 2,788.40-4,179.42-1,325.48

Finding the Fourth Proportional to 2,788.40, 4,179.42 and 1,325.48

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Solution

The fourth proportional to 2,788.40, 4,179.42 and 1,325.48 is: 1,986.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,788.40 : 4,179.42 = 1,325.48 : x
  2. Step 2: Convert to fraction form
    2,788.40/4,179.42 = 1,325.48/x
  3. Step 3: Cross multiply
    2,788.40x = 4,179.42 × 1,325.48
  4. Step 4: Simplify right side
    2,788.40x = 5,539,737.62
  5. Step 5: Solve for x
    x = 5,539,737.62/2,788.40
  6. Step 6: Final answer
    x = 1,986.71

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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.