Home / 2,121.05-3,179.92-1,009.89

Finding the Fourth Proportional to 2,121.05, 3,179.92 and 1,009.89

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Solution

The fourth proportional to 2,121.05, 3,179.92 and 1,009.89 is: 1,514.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.05 : 3,179.92 = 1,009.89 : x
  2. Step 2: Convert to fraction form
    2,121.05/3,179.92 = 1,009.89/x
  3. Step 3: Cross multiply
    2,121.05x = 3,179.92 × 1,009.89
  4. Step 4: Simplify right side
    2,121.05x = 3,211,379.14
  5. Step 5: Solve for x
    x = 3,211,379.14/2,121.05
  6. Step 6: Final answer
    x = 1,514.05

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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.