Home / 2,274.99-3,139.67-1,280.21

Finding the Fourth Proportional to 2,274.99, 3,139.67 and 1,280.21

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Solution

The fourth proportional to 2,274.99, 3,139.67 and 1,280.21 is: 1,766.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,274.99 : 3,139.67 = 1,280.21 : x
  2. Step 2: Convert to fraction form
    2,274.99/3,139.67 = 1,280.21/x
  3. Step 3: Cross multiply
    2,274.99x = 3,139.67 × 1,280.21
  4. Step 4: Simplify right side
    2,274.99x = 4,019,436.93
  5. Step 5: Solve for x
    x = 4,019,436.93/2,274.99
  6. Step 6: Final answer
    x = 1,766.79

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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.