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Finding the Fourth Proportional to 2,579.34, 3,869.49 and 849.18

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Solution

The fourth proportional to 2,579.34, 3,869.49 and 849.18 is: 1,273.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,579.34 : 3,869.49 = 849.18 : x
  2. Step 2: Convert to fraction form
    2,579.34/3,869.49 = 849.18/x
  3. Step 3: Cross multiply
    2,579.34x = 3,869.49 × 849.18
  4. Step 4: Simplify right side
    2,579.34x = 3,285,893.52
  5. Step 5: Solve for x
    x = 3,285,893.52/2,579.34
  6. Step 6: Final answer
    x = 1,273.93

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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.