Home / 891.47-1,229.08-611.21

Finding the Fourth Proportional to 891.47, 1,229.08 and 611.21

Calculator

Solution

The fourth proportional to 891.47, 1,229.08 and 611.21 is: 842.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    891.47 : 1,229.08 = 611.21 : x
  2. Step 2: Convert to fraction form
    891.47/1,229.08 = 611.21/x
  3. Step 3: Cross multiply
    891.47x = 1,229.08 × 611.21
  4. Step 4: Simplify right side
    891.47x = 751,225.99
  5. Step 5: Solve for x
    x = 751,225.99/891.47
  6. Step 6: Final answer
    x = 842.68

Related Problems

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.