Home / 2,280.78-3,147.66-1,286.25

Finding the Fourth Proportional to 2,280.78, 3,147.66 and 1,286.25

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Solution

The fourth proportional to 2,280.78, 3,147.66 and 1,286.25 is: 1,775.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,280.78 : 3,147.66 = 1,286.25 : x
  2. Step 2: Convert to fraction form
    2,280.78/3,147.66 = 1,286.25/x
  3. Step 3: Cross multiply
    2,280.78x = 3,147.66 × 1,286.25
  4. Step 4: Simplify right side
    2,280.78x = 4,048,677.68
  5. Step 5: Solve for x
    x = 4,048,677.68/2,280.78
  6. Step 6: Final answer
    x = 1,775.13

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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.