Home / 2,255.91-3,113.15-1,261.19

Finding the Fourth Proportional to 2,255.91, 3,113.15 and 1,261.19

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Solution

The fourth proportional to 2,255.91, 3,113.15 and 1,261.19 is: 1,740.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,255.91 : 3,113.15 = 1,261.19 : x
  2. Step 2: Convert to fraction form
    2,255.91/3,113.15 = 1,261.19/x
  3. Step 3: Cross multiply
    2,255.91x = 3,113.15 × 1,261.19
  4. Step 4: Simplify right side
    2,255.91x = 3,926,251.78
  5. Step 5: Solve for x
    x = 3,926,251.78/2,255.91
  6. Step 6: Final answer
    x = 1,740.43

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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.