Home / 2,155.23-3,224.67-1,278.20

Finding the Fourth Proportional to 2,155.23, 3,224.67 and 1,278.20

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Solution

The fourth proportional to 2,155.23, 3,224.67 and 1,278.20 is: 1,912.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,155.23 : 3,224.67 = 1,278.20 : x
  2. Step 2: Convert to fraction form
    2,155.23/3,224.67 = 1,278.20/x
  3. Step 3: Cross multiply
    2,155.23x = 3,224.67 × 1,278.20
  4. Step 4: Simplify right side
    2,155.23x = 4,121,757.07
  5. Step 5: Solve for x
    x = 4,121,757.07/2,155.23
  6. Step 6: Final answer
    x = 1,912.44

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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.