Home / 966-1,449-316.78

Finding the Fourth Proportional to 966, 1,449 and 316.78

Calculator

Solution

The fourth proportional to 966, 1,449 and 316.78 is: 475.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    966 : 1,449 = 316.78 : x
  2. Step 2: Convert to fraction form
    966/1,449 = 316.78/x
  3. Step 3: Cross multiply
    966x = 1,449 × 316.78
  4. Step 4: Simplify right side
    966x = 459,014.22
  5. Step 5: Solve for x
    x = 459,014.22/966
  6. Step 6: Final answer
    x = 475.17

Related Problems

Find fourth proportional to 483, 724.50 and 158.39
Half scale
Find fourth proportional to 1,932, 2,898 and 633.56
Double scale
Find fourth proportional to 967, 1,450.50 and 317.78
Similar ratio
Find fourth proportional to 1,449, 2,173.50 and 475.17
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.