Home / 425.21-586.49-326.79

Finding the Fourth Proportional to 425.21, 586.49 and 326.79

Calculator

Solution

The fourth proportional to 425.21, 586.49 and 326.79 is: 450.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    425.21 : 586.49 = 326.79 : x
  2. Step 2: Convert to fraction form
    425.21/586.49 = 326.79/x
  3. Step 3: Cross multiply
    425.21x = 586.49 × 326.79
  4. Step 4: Simplify right side
    425.21x = 191,657.43
  5. Step 5: Solve for x
    x = 191,657.43/425.21
  6. Step 6: Final answer
    x = 450.74

Related Problems

Find fourth proportional to 212.60, 293.24 and 163.40
Half scale
Find fourth proportional to 850.41, 1,172.97 and 653.58
Double scale
Find fourth proportional to 426.21, 587.86 and 327.79
Similar ratio
Find fourth proportional to 637.81, 879.73 and 490.19
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.