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Finding the Fourth Proportional to 2,012.85, 3,019.13 and 551.88

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Solution

The fourth proportional to 2,012.85, 3,019.13 and 551.88 is: 827.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,012.85 : 3,019.13 = 551.88 : x
  2. Step 2: Convert to fraction form
    2,012.85/3,019.13 = 551.88/x
  3. Step 3: Cross multiply
    2,012.85x = 3,019.13 × 551.88
  4. Step 4: Simplify right side
    2,012.85x = 1,666,183.75
  5. Step 5: Solve for x
    x = 1,666,183.75/2,012.85
  6. Step 6: Final answer
    x = 827.78

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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.