Home / 300-450.12-129

Finding the Fourth Proportional to 300, 450.12 and 129

Calculator

Solution

The fourth proportional to 300, 450.12 and 129 is: 193.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    300 : 450.12 = 129 : x
  2. Step 2: Convert to fraction form
    300/450.12 = 129/x
  3. Step 3: Cross multiply
    300x = 450.12 × 129
  4. Step 4: Simplify right side
    300x = 58,065.48
  5. Step 5: Solve for x
    x = 58,065.48/300
  6. Step 6: Final answer
    x = 193.55

Related Problems

Find fourth proportional to 150, 225.06 and 64.50
Half scale
Find fourth proportional to 600, 900.24 and 258
Double scale
Find fourth proportional to 301, 451.62 and 130
Similar ratio
Find fourth proportional to 450, 675.18 and 193.50
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.