Home / 3,483.20-4,806.78-1,991.18

Finding the Fourth Proportional to 3,483.20, 4,806.78 and 1,991.18

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Solution

The fourth proportional to 3,483.20, 4,806.78 and 1,991.18 is: 2,747.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,483.20 : 4,806.78 = 1,991.18 : x
  2. Step 2: Convert to fraction form
    3,483.20/4,806.78 = 1,991.18/x
  3. Step 3: Cross multiply
    3,483.20x = 4,806.78 × 1,991.18
  4. Step 4: Simplify right side
    3,483.20x = 9,571,164.20
  5. Step 5: Solve for x
    x = 9,571,164.20/3,483.20
  6. Step 6: Final answer
    x = 2,747.81

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1.5x scale

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.