Home / 1,949.80-2,918.94-1,220.20

Finding the Fourth Proportional to 1,949.80, 2,918.94 and 1,220.20

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Solution

The fourth proportional to 1,949.80, 2,918.94 and 1,220.20 is: 1,826.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,949.80 : 2,918.94 = 1,220.20 : x
  2. Step 2: Convert to fraction form
    1,949.80/2,918.94 = 1,220.20/x
  3. Step 3: Cross multiply
    1,949.80x = 2,918.94 × 1,220.20
  4. Step 4: Simplify right side
    1,949.80x = 3,561,690.59
  5. Step 5: Solve for x
    x = 3,561,690.59/1,949.80
  6. Step 6: Final answer
    x = 1,826.70

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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.