Home / 521.88-720.17-300.84

Finding the Fourth Proportional to 521.88, 720.17 and 300.84

Calculator

Solution

The fourth proportional to 521.88, 720.17 and 300.84 is: 415.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.88 : 720.17 = 300.84 : x
  2. Step 2: Convert to fraction form
    521.88/720.17 = 300.84/x
  3. Step 3: Cross multiply
    521.88x = 720.17 × 300.84
  4. Step 4: Simplify right side
    521.88x = 216,655.94
  5. Step 5: Solve for x
    x = 216,655.94/521.88
  6. Step 6: Final answer
    x = 415.15

Related Problems

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.