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Finding the Fourth Proportional to 2,012.56, 3,018.88 and 779.84

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Solution

The fourth proportional to 2,012.56, 3,018.88 and 779.84 is: 1,169.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,012.56 : 3,018.88 = 779.84 : x
  2. Step 2: Convert to fraction form
    2,012.56/3,018.88 = 779.84/x
  3. Step 3: Cross multiply
    2,012.56x = 3,018.88 × 779.84
  4. Step 4: Simplify right side
    2,012.56x = 2,354,243.38
  5. Step 5: Solve for x
    x = 2,354,243.38/2,012.56
  6. Step 6: Final answer
    x = 1,169.78

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.