Home / 333.19-459.66-221.21

Finding the Fourth Proportional to 333.19, 459.66 and 221.21

Calculator

Solution

The fourth proportional to 333.19, 459.66 and 221.21 is: 305.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    333.19 : 459.66 = 221.21 : x
  2. Step 2: Convert to fraction form
    333.19/459.66 = 221.21/x
  3. Step 3: Cross multiply
    333.19x = 459.66 × 221.21
  4. Step 4: Simplify right side
    333.19x = 101,681.27
  5. Step 5: Solve for x
    x = 101,681.27/333.19
  6. Step 6: Final answer
    x = 305.18

Related Problems

Find fourth proportional to 166.59, 229.83 and 110.60
Half scale
Find fourth proportional to 666.37, 919.33 and 442.42
Double scale
Find fourth proportional to 334.19, 461.04 and 222.21
Similar ratio
Find fourth proportional to 499.78, 689.49 and 331.81
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.