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Finding the Fourth Proportional to 3,578.67, 5,362.16 and 1,821.26

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Solution

The fourth proportional to 3,578.67, 5,362.16 and 1,821.26 is: 2,728.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,578.67 : 5,362.16 = 1,821.26 : x
  2. Step 2: Convert to fraction form
    3,578.67/5,362.16 = 1,821.26/x
  3. Step 3: Cross multiply
    3,578.67x = 5,362.16 × 1,821.26
  4. Step 4: Simplify right side
    3,578.67x = 9,765,865.26
  5. Step 5: Solve for x
    x = 9,765,865.26/3,578.67
  6. Step 6: Final answer
    x = 2,728.91

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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.