Home / 461.20-628-461.20

Finding the Fourth Proportional to 461.20, 628 and 461.20

Calculator

Solution

The fourth proportional to 461.20, 628 and 461.20 is: 628

Step by Step Solution

  1. Step 1: Write the proportion equation
    461.20 : 628 = 461.20 : x
  2. Step 2: Convert to fraction form
    461.20/628 = 461.20/x
  3. Step 3: Cross multiply
    461.20x = 628 × 461.20
  4. Step 4: Simplify right side
    461.20x = 289,633.60
  5. Step 5: Solve for x
    x = 289,633.60/461.20
  6. Step 6: Final answer
    x = 628

Related Problems

Find fourth proportional to 230.60, 314 and 230.60
Half scale
Find fourth proportional to 922.40, 1,256 and 922.40
Double scale
Find fourth proportional to 462.20, 629.36 and 462.20
Similar ratio
Find fourth proportional to 691.80, 942 and 691.80
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.