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Finding the Fourth Proportional to 2,548.43, 3,821.44 and 989.17

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Solution

The fourth proportional to 2,548.43, 3,821.44 and 989.17 is: 1,483.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,548.43 : 3,821.44 = 989.17 : x
  2. Step 2: Convert to fraction form
    2,548.43/3,821.44 = 989.17/x
  3. Step 3: Cross multiply
    2,548.43x = 3,821.44 × 989.17
  4. Step 4: Simplify right side
    2,548.43x = 3,780,041.78
  5. Step 5: Solve for x
    x = 3,780,041.78/2,548.43
  6. Step 6: Final answer
    x = 1,483.28

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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.