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Finding the Fourth Proportional to 1,768.43, 2,440.42 and 982.47

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Solution

The fourth proportional to 1,768.43, 2,440.42 and 982.47 is: 1,355.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,768.43 : 2,440.42 = 982.47 : x
  2. Step 2: Convert to fraction form
    1,768.43/2,440.42 = 982.47/x
  3. Step 3: Cross multiply
    1,768.43x = 2,440.42 × 982.47
  4. Step 4: Simplify right side
    1,768.43x = 2,397,639.44
  5. Step 5: Solve for x
    x = 2,397,639.44/1,768.43
  6. Step 6: Final answer
    x = 1,355.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.