Home / 1,611-2,416.50-395

Finding the Fourth Proportional to 1,611, 2,416.50 and 395

Calculator

Solution

The fourth proportional to 1,611, 2,416.50 and 395 is: 592.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,611 : 2,416.50 = 395 : x
  2. Step 2: Convert to fraction form
    1,611/2,416.50 = 395/x
  3. Step 3: Cross multiply
    1,611x = 2,416.50 × 395
  4. Step 4: Simplify right side
    1,611x = 954,517.50
  5. Step 5: Solve for x
    x = 954,517.50/1,611
  6. Step 6: Final answer
    x = 592.50

Related Problems

Find fourth proportional to 805.50, 1,208.25 and 197.50
Half scale
Find fourth proportional to 3,222, 4,833 and 790
Double scale
Find fourth proportional to 1,612, 2,418 and 396
Similar ratio
Find fourth proportional to 2,416.50, 3,624.75 and 592.50
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.