Home / 2,219.72-3,327.26-1,121.78

Finding the Fourth Proportional to 2,219.72, 3,327.26 and 1,121.78

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Solution

The fourth proportional to 2,219.72, 3,327.26 and 1,121.78 is: 1,681.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,219.72 : 3,327.26 = 1,121.78 : x
  2. Step 2: Convert to fraction form
    2,219.72/3,327.26 = 1,121.78/x
  3. Step 3: Cross multiply
    2,219.72x = 3,327.26 × 1,121.78
  4. Step 4: Simplify right side
    2,219.72x = 3,732,453.72
  5. Step 5: Solve for x
    x = 3,732,453.72/2,219.72
  6. Step 6: Final answer
    x = 1,681.50

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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.