Home / 613-846-380.20

Finding the Fourth Proportional to 613, 846 and 380.20

Calculator

Solution

The fourth proportional to 613, 846 and 380.20 is: 524.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    613 : 846 = 380.20 : x
  2. Step 2: Convert to fraction form
    613/846 = 380.20/x
  3. Step 3: Cross multiply
    613x = 846 × 380.20
  4. Step 4: Simplify right side
    613x = 321,649.20
  5. Step 5: Solve for x
    x = 321,649.20/613
  6. Step 6: Final answer
    x = 524.71

Related Problems

Find fourth proportional to 306.50, 423 and 190.10
Half scale
Find fourth proportional to 1,226, 1,692 and 760.40
Double scale
Find fourth proportional to 614, 847.38 and 381.20
Similar ratio
Find fourth proportional to 919.50, 1,269 and 570.30
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.