Home / 299-412.50-211.72

Finding the Fourth Proportional to 299, 412.50 and 211.72

Calculator

Solution

The fourth proportional to 299, 412.50 and 211.72 is: 292.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    299 : 412.50 = 211.72 : x
  2. Step 2: Convert to fraction form
    299/412.50 = 211.72/x
  3. Step 3: Cross multiply
    299x = 412.50 × 211.72
  4. Step 4: Simplify right side
    299x = 87,334.50
  5. Step 5: Solve for x
    x = 87,334.50/299
  6. Step 6: Final answer
    x = 292.09

Related Problems

Find fourth proportional to 149.50, 206.25 and 105.86
Half scale
Find fourth proportional to 598, 825 and 423.44
Double scale
Find fourth proportional to 300, 413.88 and 212.72
Similar ratio
Find fourth proportional to 448.50, 618.75 and 317.58
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.