Home / 2,778.45-3,835.66-2,147.55

Finding the Fourth Proportional to 2,778.45, 3,835.66 and 2,147.55

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Solution

The fourth proportional to 2,778.45, 3,835.66 and 2,147.55 is: 2,964.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,778.45 : 3,835.66 = 2,147.55 : x
  2. Step 2: Convert to fraction form
    2,778.45/3,835.66 = 2,147.55/x
  3. Step 3: Cross multiply
    2,778.45x = 3,835.66 × 2,147.55
  4. Step 4: Simplify right side
    2,778.45x = 8,237,271.44
  5. Step 5: Solve for x
    x = 8,237,271.44/2,778.45
  6. Step 6: Final answer
    x = 2,964.70

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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.