Home / 382.50-573.75-126

Finding the Fourth Proportional to 382.50, 573.75 and 126

Calculator

Solution

The fourth proportional to 382.50, 573.75 and 126 is: 189

Step by Step Solution

  1. Step 1: Write the proportion equation
    382.50 : 573.75 = 126 : x
  2. Step 2: Convert to fraction form
    382.50/573.75 = 126/x
  3. Step 3: Cross multiply
    382.50x = 573.75 × 126
  4. Step 4: Simplify right side
    382.50x = 72,292.50
  5. Step 5: Solve for x
    x = 72,292.50/382.50
  6. Step 6: Final answer
    x = 189

Related Problems

Find fourth proportional to 191.25, 286.88 and 63
Half scale
Find fourth proportional to 765, 1,147.50 and 252
Double scale
Find fourth proportional to 383.50, 575.25 and 127
Similar ratio
Find fourth proportional to 573.75, 860.63 and 189
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.