Home / 611-843.20-349

Finding the Fourth Proportional to 611, 843.20 and 349

Calculator

Solution

The fourth proportional to 611, 843.20 and 349 is: 481.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    611 : 843.20 = 349 : x
  2. Step 2: Convert to fraction form
    611/843.20 = 349/x
  3. Step 3: Cross multiply
    611x = 843.20 × 349
  4. Step 4: Simplify right side
    611x = 294,276.80
  5. Step 5: Solve for x
    x = 294,276.80/611
  6. Step 6: Final answer
    x = 481.63

Related Problems

Find fourth proportional to 305.50, 421.60 and 174.50
Half scale
Find fourth proportional to 1,222, 1,686.40 and 698
Double scale
Find fourth proportional to 612, 844.58 and 350
Similar ratio
Find fourth proportional to 916.50, 1,264.80 and 523.50
1.5x scale

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.