Home / 1,990.14-2,981.69-1,208.54

Finding the Fourth Proportional to 1,990.14, 2,981.69 and 1,208.54

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Solution

The fourth proportional to 1,990.14, 2,981.69 and 1,208.54 is: 1,810.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990.14 : 2,981.69 = 1,208.54 : x
  2. Step 2: Convert to fraction form
    1,990.14/2,981.69 = 1,208.54/x
  3. Step 3: Cross multiply
    1,990.14x = 2,981.69 × 1,208.54
  4. Step 4: Simplify right side
    1,990.14x = 3,603,497.58
  5. Step 5: Solve for x
    x = 3,603,497.58/1,990.14
  6. Step 6: Final answer
    x = 1,810.68

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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.