Home / 1,329.89-1,994.80-356

Finding the Fourth Proportional to 1,329.89, 1,994.80 and 356

Calculator

Solution

The fourth proportional to 1,329.89, 1,994.80 and 356 is: 533.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,329.89 : 1,994.80 = 356 : x
  2. Step 2: Convert to fraction form
    1,329.89/1,994.80 = 356/x
  3. Step 3: Cross multiply
    1,329.89x = 1,994.80 × 356
  4. Step 4: Simplify right side
    1,329.89x = 710,148.80
  5. Step 5: Solve for x
    x = 710,148.80/1,329.89
  6. Step 6: Final answer
    x = 533.99

Related Problems

Find fourth proportional to 664.95, 997.40 and 178
Half scale
Find fourth proportional to 2,659.78, 3,989.60 and 712
Double scale
Find fourth proportional to 1,330.89, 1,996.30 and 357
Similar ratio
Find fourth proportional to 1,994.84, 2,992.20 and 534
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.