Home / 619-855.82-591.80

Finding the Fourth Proportional to 619, 855.82 and 591.80

Calculator

Solution

The fourth proportional to 619, 855.82 and 591.80 is: 818.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    619 : 855.82 = 591.80 : x
  2. Step 2: Convert to fraction form
    619/855.82 = 591.80/x
  3. Step 3: Cross multiply
    619x = 855.82 × 591.80
  4. Step 4: Simplify right side
    619x = 506,474.28
  5. Step 5: Solve for x
    x = 506,474.28/619
  6. Step 6: Final answer
    x = 818.21

Related Problems

Find fourth proportional to 309.50, 427.91 and 295.90
Half scale
Find fourth proportional to 1,238, 1,711.64 and 1,183.60
Double scale
Find fourth proportional to 620, 857.20 and 592.80
Similar ratio
Find fourth proportional to 928.50, 1,283.73 and 887.70
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.