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Finding the Fourth Proportional to 2,011.96, 3,019.09 and 779.46

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Solution

The fourth proportional to 2,011.96, 3,019.09 and 779.46 is: 1,169.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,011.96 : 3,019.09 = 779.46 : x
  2. Step 2: Convert to fraction form
    2,011.96/3,019.09 = 779.46/x
  3. Step 3: Cross multiply
    2,011.96x = 3,019.09 × 779.46
  4. Step 4: Simplify right side
    2,011.96x = 2,353,257.53
  5. Step 5: Solve for x
    x = 2,353,257.53/2,011.96
  6. Step 6: Final answer
    x = 1,169.63

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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.