Home / 931-1,396.50-323

Finding the Fourth Proportional to 931, 1,396.50 and 323

Calculator

Solution

The fourth proportional to 931, 1,396.50 and 323 is: 484.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    931 : 1,396.50 = 323 : x
  2. Step 2: Convert to fraction form
    931/1,396.50 = 323/x
  3. Step 3: Cross multiply
    931x = 1,396.50 × 323
  4. Step 4: Simplify right side
    931x = 451,069.50
  5. Step 5: Solve for x
    x = 451,069.50/931
  6. Step 6: Final answer
    x = 484.50

Related Problems

Find fourth proportional to 465.50, 698.25 and 161.50
Half scale
Find fourth proportional to 1,862, 2,793 and 646
Double scale
Find fourth proportional to 932, 1,398 and 324
Similar ratio
Find fourth proportional to 1,396.50, 2,094.75 and 484.50
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.