Home / 1,991.46-2,751.74-1,433.78

Finding the Fourth Proportional to 1,991.46, 2,751.74 and 1,433.78

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Solution

The fourth proportional to 1,991.46, 2,751.74 and 1,433.78 is: 1,981.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,991.46 : 2,751.74 = 1,433.78 : x
  2. Step 2: Convert to fraction form
    1,991.46/2,751.74 = 1,433.78/x
  3. Step 3: Cross multiply
    1,991.46x = 2,751.74 × 1,433.78
  4. Step 4: Simplify right side
    1,991.46x = 3,945,368.85
  5. Step 5: Solve for x
    x = 3,945,368.85/1,991.46
  6. Step 6: Final answer
    x = 1,981.14

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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.