Home / 1,982.99-2,738.82-1,318.69

Finding the Fourth Proportional to 1,982.99, 2,738.82 and 1,318.69

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Solution

The fourth proportional to 1,982.99, 2,738.82 and 1,318.69 is: 1,821.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,982.99 : 2,738.82 = 1,318.69 : x
  2. Step 2: Convert to fraction form
    1,982.99/2,738.82 = 1,318.69/x
  3. Step 3: Cross multiply
    1,982.99x = 2,738.82 × 1,318.69
  4. Step 4: Simplify right side
    1,982.99x = 3,611,654.55
  5. Step 5: Solve for x
    x = 3,611,654.55/1,982.99
  6. Step 6: Final answer
    x = 1,821.32

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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.