Home / 1,278.79-1,919.09-1,163.97

Finding the Fourth Proportional to 1,278.79, 1,919.09 and 1,163.97

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Solution

The fourth proportional to 1,278.79, 1,919.09 and 1,163.97 is: 1,746.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278.79 : 1,919.09 = 1,163.97 : x
  2. Step 2: Convert to fraction form
    1,278.79/1,919.09 = 1,163.97/x
  3. Step 3: Cross multiply
    1,278.79x = 1,919.09 × 1,163.97
  4. Step 4: Simplify right side
    1,278.79x = 2,233,766.10
  5. Step 5: Solve for x
    x = 2,233,766.10/1,278.79
  6. Step 6: Final answer
    x = 1,746.78

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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.