Home / 2,280.85-3,147.38-1,286.37

Finding the Fourth Proportional to 2,280.85, 3,147.38 and 1,286.37

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Solution

The fourth proportional to 2,280.85, 3,147.38 and 1,286.37 is: 1,775.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,280.85 : 3,147.38 = 1,286.37 : x
  2. Step 2: Convert to fraction form
    2,280.85/3,147.38 = 1,286.37/x
  3. Step 3: Cross multiply
    2,280.85x = 3,147.38 × 1,286.37
  4. Step 4: Simplify right side
    2,280.85x = 4,048,695.21
  5. Step 5: Solve for x
    x = 4,048,695.21/2,280.85
  6. Step 6: Final answer
    x = 1,775.08

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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.