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Finding the Fourth Proportional to 3,821.78, 5,730.54 and 1,322.22

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Solution

The fourth proportional to 3,821.78, 5,730.54 and 1,322.22 is: 1,982.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,821.78 : 5,730.54 = 1,322.22 : x
  2. Step 2: Convert to fraction form
    3,821.78/5,730.54 = 1,322.22/x
  3. Step 3: Cross multiply
    3,821.78x = 5,730.54 × 1,322.22
  4. Step 4: Simplify right side
    3,821.78x = 7,577,034.60
  5. Step 5: Solve for x
    x = 7,577,034.60/3,821.78
  6. Step 6: Final answer
    x = 1,982.59

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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.