Home / 2,231.29-3,078.70-1,299.25

Finding the Fourth Proportional to 2,231.29, 3,078.70 and 1,299.25

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Solution

The fourth proportional to 2,231.29, 3,078.70 and 1,299.25 is: 1,792.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,231.29 : 3,078.70 = 1,299.25 : x
  2. Step 2: Convert to fraction form
    2,231.29/3,078.70 = 1,299.25/x
  3. Step 3: Cross multiply
    2,231.29x = 3,078.70 × 1,299.25
  4. Step 4: Simplify right side
    2,231.29x = 4,000,000.98
  5. Step 5: Solve for x
    x = 4,000,000.98/2,231.29
  6. Step 6: Final answer
    x = 1,792.69

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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.