Home / 2,778.80-4,166.24-1,391.15

Finding the Fourth Proportional to 2,778.80, 4,166.24 and 1,391.15

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Solution

The fourth proportional to 2,778.80, 4,166.24 and 1,391.15 is: 2,085.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,778.80 : 4,166.24 = 1,391.15 : x
  2. Step 2: Convert to fraction form
    2,778.80/4,166.24 = 1,391.15/x
  3. Step 3: Cross multiply
    2,778.80x = 4,166.24 × 1,391.15
  4. Step 4: Simplify right side
    2,778.80x = 5,795,847.42
  5. Step 5: Solve for x
    x = 5,795,847.42/2,778.80
  6. Step 6: Final answer
    x = 2,085.74

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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.