Home / 2,769.21-3,819.40-1,929.91

Finding the Fourth Proportional to 2,769.21, 3,819.40 and 1,929.91

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Solution

The fourth proportional to 2,769.21, 3,819.40 and 1,929.91 is: 2,661.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,769.21 : 3,819.40 = 1,929.91 : x
  2. Step 2: Convert to fraction form
    2,769.21/3,819.40 = 1,929.91/x
  3. Step 3: Cross multiply
    2,769.21x = 3,819.40 × 1,929.91
  4. Step 4: Simplify right side
    2,769.21x = 7,371,098.25
  5. Step 5: Solve for x
    x = 7,371,098.25/2,769.21
  6. Step 6: Final answer
    x = 2,661.81

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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.