Home / 423-634.50-119

Finding the Fourth Proportional to 423, 634.50 and 119

Calculator

Solution

The fourth proportional to 423, 634.50 and 119 is: 178.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    423 : 634.50 = 119 : x
  2. Step 2: Convert to fraction form
    423/634.50 = 119/x
  3. Step 3: Cross multiply
    423x = 634.50 × 119
  4. Step 4: Simplify right side
    423x = 75,505.50
  5. Step 5: Solve for x
    x = 75,505.50/423
  6. Step 6: Final answer
    x = 178.50

Related Problems

Find fourth proportional to 211.50, 317.25 and 59.50
Half scale
Find fourth proportional to 846, 1,269 and 238
Double scale
Find fourth proportional to 424, 636 and 120
Similar ratio
Find fourth proportional to 634.50, 951.75 and 178.50
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.