Home / 1,919.66-2,650.05-1,289.97

Finding the Fourth Proportional to 1,919.66, 2,650.05 and 1,289.97

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Solution

The fourth proportional to 1,919.66, 2,650.05 and 1,289.97 is: 1,780.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,919.66 : 2,650.05 = 1,289.97 : x
  2. Step 2: Convert to fraction form
    1,919.66/2,650.05 = 1,289.97/x
  3. Step 3: Cross multiply
    1,919.66x = 2,650.05 × 1,289.97
  4. Step 4: Simplify right side
    1,919.66x = 3,418,485.00
  5. Step 5: Solve for x
    x = 3,418,485.00/1,919.66
  6. Step 6: Final answer
    x = 1,780.78

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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.