Home / 1,949.22-2,920.78-1,127.88

Finding the Fourth Proportional to 1,949.22, 2,920.78 and 1,127.88

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Solution

The fourth proportional to 1,949.22, 2,920.78 and 1,127.88 is: 1,690.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,949.22 : 2,920.78 = 1,127.88 : x
  2. Step 2: Convert to fraction form
    1,949.22/2,920.78 = 1,127.88/x
  3. Step 3: Cross multiply
    1,949.22x = 2,920.78 × 1,127.88
  4. Step 4: Simplify right side
    1,949.22x = 3,294,289.35
  5. Step 5: Solve for x
    x = 3,294,289.35/1,949.22
  6. Step 6: Final answer
    x = 1,690.06

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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.