Home / 2,765.90-4,147.68-1,378.70

Finding the Fourth Proportional to 2,765.90, 4,147.68 and 1,378.70

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Solution

The fourth proportional to 2,765.90, 4,147.68 and 1,378.70 is: 2,067.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,765.90 : 4,147.68 = 1,378.70 : x
  2. Step 2: Convert to fraction form
    2,765.90/4,147.68 = 1,378.70/x
  3. Step 3: Cross multiply
    2,765.90x = 4,147.68 × 1,378.70
  4. Step 4: Simplify right side
    2,765.90x = 5,718,406.42
  5. Step 5: Solve for x
    x = 5,718,406.42/2,765.90
  6. Step 6: Final answer
    x = 2,067.47

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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.