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Finding the Fourth Proportional to 2,379.23, 3,569.09 and 819.36

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Solution

The fourth proportional to 2,379.23, 3,569.09 and 819.36 is: 1,229.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,379.23 : 3,569.09 = 819.36 : x
  2. Step 2: Convert to fraction form
    2,379.23/3,569.09 = 819.36/x
  3. Step 3: Cross multiply
    2,379.23x = 3,569.09 × 819.36
  4. Step 4: Simplify right side
    2,379.23x = 2,924,369.58
  5. Step 5: Solve for x
    x = 2,924,369.58/2,379.23
  6. Step 6: Final answer
    x = 1,229.12

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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.