Home / 722.98-997.72-408.21

Finding the Fourth Proportional to 722.98, 997.72 and 408.21

Calculator

Solution

The fourth proportional to 722.98, 997.72 and 408.21 is: 563.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    722.98 : 997.72 = 408.21 : x
  2. Step 2: Convert to fraction form
    722.98/997.72 = 408.21/x
  3. Step 3: Cross multiply
    722.98x = 997.72 × 408.21
  4. Step 4: Simplify right side
    722.98x = 407,277.24
  5. Step 5: Solve for x
    x = 407,277.24/722.98
  6. Step 6: Final answer
    x = 563.34

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.