Home / 481-721.81-207.15

Finding the Fourth Proportional to 481, 721.81 and 207.15

Calculator

Solution

The fourth proportional to 481, 721.81 and 207.15 is: 310.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    481 : 721.81 = 207.15 : x
  2. Step 2: Convert to fraction form
    481/721.81 = 207.15/x
  3. Step 3: Cross multiply
    481x = 721.81 × 207.15
  4. Step 4: Simplify right side
    481x = 149,522.94
  5. Step 5: Solve for x
    x = 149,522.94/481
  6. Step 6: Final answer
    x = 310.86

Related Problems

Find fourth proportional to 240.50, 360.91 and 103.58
Half scale
Find fourth proportional to 962, 1,443.62 and 414.30
Double scale
Find fourth proportional to 482, 723.31 and 208.15
Similar ratio
Find fourth proportional to 721.50, 1,082.72 and 310.73
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.