Home / 2,147.40-3,219.24-1,279.89

Finding the Fourth Proportional to 2,147.40, 3,219.24 and 1,279.89

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Solution

The fourth proportional to 2,147.40, 3,219.24 and 1,279.89 is: 1,918.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,147.40 : 3,219.24 = 1,279.89 : x
  2. Step 2: Convert to fraction form
    2,147.40/3,219.24 = 1,279.89/x
  3. Step 3: Cross multiply
    2,147.40x = 3,219.24 × 1,279.89
  4. Step 4: Simplify right side
    2,147.40x = 4,120,273.08
  5. Step 5: Solve for x
    x = 4,120,273.08/2,147.40
  6. Step 6: Final answer
    x = 1,918.73

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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.