Home / 727.97-1,086.26-640.49

Finding the Fourth Proportional to 727.97, 1,086.26 and 640.49

Calculator

Solution

The fourth proportional to 727.97, 1,086.26 and 640.49 is: 955.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    727.97 : 1,086.26 = 640.49 : x
  2. Step 2: Convert to fraction form
    727.97/1,086.26 = 640.49/x
  3. Step 3: Cross multiply
    727.97x = 1,086.26 × 640.49
  4. Step 4: Simplify right side
    727.97x = 695,738.67
  5. Step 5: Solve for x
    x = 695,738.67/727.97
  6. Step 6: Final answer
    x = 955.72

Related Problems

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.