Home / 357-492.44-318.12

Finding the Fourth Proportional to 357, 492.44 and 318.12

Calculator

Solution

The fourth proportional to 357, 492.44 and 318.12 is: 438.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    357 : 492.44 = 318.12 : x
  2. Step 2: Convert to fraction form
    357/492.44 = 318.12/x
  3. Step 3: Cross multiply
    357x = 492.44 × 318.12
  4. Step 4: Simplify right side
    357x = 156,655.01
  5. Step 5: Solve for x
    x = 156,655.01/357
  6. Step 6: Final answer
    x = 438.81

Related Problems

Find fourth proportional to 178.50, 246.22 and 159.06
Half scale
Find fourth proportional to 714, 984.88 and 636.24
Double scale
Find fourth proportional to 358, 493.82 and 319.12
Similar ratio
Find fourth proportional to 535.50, 738.66 and 477.18
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.