Home / 2,255.54-3,111.72-1,371.20

Finding the Fourth Proportional to 2,255.54, 3,111.72 and 1,371.20

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Solution

The fourth proportional to 2,255.54, 3,111.72 and 1,371.20 is: 1,891.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,255.54 : 3,111.72 = 1,371.20 : x
  2. Step 2: Convert to fraction form
    2,255.54/3,111.72 = 1,371.20/x
  3. Step 3: Cross multiply
    2,255.54x = 3,111.72 × 1,371.20
  4. Step 4: Simplify right side
    2,255.54x = 4,266,790.46
  5. Step 5: Solve for x
    x = 4,266,790.46/2,255.54
  6. Step 6: Final answer
    x = 1,891.69

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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.