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Finding the Fourth Proportional to 2,579.62, 3,869.99 and 800.65

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Solution

The fourth proportional to 2,579.62, 3,869.99 and 800.65 is: 1,201.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,579.62 : 3,869.99 = 800.65 : x
  2. Step 2: Convert to fraction form
    2,579.62/3,869.99 = 800.65/x
  3. Step 3: Cross multiply
    2,579.62x = 3,869.99 × 800.65
  4. Step 4: Simplify right side
    2,579.62x = 3,098,486.56
  5. Step 5: Solve for x
    x = 3,098,486.56/2,579.62
  6. Step 6: Final answer
    x = 1,201.14

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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.