Home / 2,280.70-3,147.34-1,286.30

Finding the Fourth Proportional to 2,280.70, 3,147.34 and 1,286.30

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Solution

The fourth proportional to 2,280.70, 3,147.34 and 1,286.30 is: 1,775.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,280.70 : 3,147.34 = 1,286.30 : x
  2. Step 2: Convert to fraction form
    2,280.70/3,147.34 = 1,286.30/x
  3. Step 3: Cross multiply
    2,280.70x = 3,147.34 × 1,286.30
  4. Step 4: Simplify right side
    2,280.70x = 4,048,434.12
  5. Step 5: Solve for x
    x = 4,048,434.12/2,280.70
  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.