Home / 2,261.22-3,121.65-1,561.38

Finding the Fourth Proportional to 2,261.22, 3,121.65 and 1,561.38

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Solution

The fourth proportional to 2,261.22, 3,121.65 and 1,561.38 is: 2,155.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,261.22 : 3,121.65 = 1,561.38 : x
  2. Step 2: Convert to fraction form
    2,261.22/3,121.65 = 1,561.38/x
  3. Step 3: Cross multiply
    2,261.22x = 3,121.65 × 1,561.38
  4. Step 4: Simplify right side
    2,261.22x = 4,874,081.88
  5. Step 5: Solve for x
    x = 4,874,081.88/2,261.22
  6. Step 6: Final answer
    x = 2,155.51

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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.