Home / 2,081.08-3,121.09-619.89

Finding the Fourth Proportional to 2,081.08, 3,121.09 and 619.89

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Solution

The fourth proportional to 2,081.08, 3,121.09 and 619.89 is: 929.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,081.08 : 3,121.09 = 619.89 : x
  2. Step 2: Convert to fraction form
    2,081.08/3,121.09 = 619.89/x
  3. Step 3: Cross multiply
    2,081.08x = 3,121.09 × 619.89
  4. Step 4: Simplify right side
    2,081.08x = 1,934,732.48
  5. Step 5: Solve for x
    x = 1,934,732.48/2,081.08
  6. Step 6: Final answer
    x = 929.68

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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.