Home / 2,190.78-3,279.69-1,322.46

Finding the Fourth Proportional to 2,190.78, 3,279.69 and 1,322.46

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Solution

The fourth proportional to 2,190.78, 3,279.69 and 1,322.46 is: 1,979.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,190.78 : 3,279.69 = 1,322.46 : x
  2. Step 2: Convert to fraction form
    2,190.78/3,279.69 = 1,322.46/x
  3. Step 3: Cross multiply
    2,190.78x = 3,279.69 × 1,322.46
  4. Step 4: Simplify right side
    2,190.78x = 4,337,258.84
  5. Step 5: Solve for x
    x = 4,337,258.84/2,190.78
  6. Step 6: Final answer
    x = 1,979.78

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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.