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Finding the Fourth Proportional to 3,290.50, 4,936.62 and 982

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Solution

The fourth proportional to 3,290.50, 4,936.62 and 982 is: 1,473.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,290.50 : 4,936.62 = 982 : x
  2. Step 2: Convert to fraction form
    3,290.50/4,936.62 = 982/x
  3. Step 3: Cross multiply
    3,290.50x = 4,936.62 × 982
  4. Step 4: Simplify right side
    3,290.50x = 4,847,760.84
  5. Step 5: Solve for x
    x = 4,847,760.84/3,290.50
  6. Step 6: Final answer
    x = 1,473.26

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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.