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Finding the Fourth Proportional to 2,988.44, 4,489.32 and 1,821.44

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Solution

The fourth proportional to 2,988.44, 4,489.32 and 1,821.44 is: 2,736.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,988.44 : 4,489.32 = 1,821.44 : x
  2. Step 2: Convert to fraction form
    2,988.44/4,489.32 = 1,821.44/x
  3. Step 3: Cross multiply
    2,988.44x = 4,489.32 × 1,821.44
  4. Step 4: Simplify right side
    2,988.44x = 8,177,027.02
  5. Step 5: Solve for x
    x = 8,177,027.02/2,988.44
  6. Step 6: Final answer
    x = 2,736.22

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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.