Home / 438.80-658.88-419.32

Finding the Fourth Proportional to 438.80, 658.88 and 419.32

Calculator

Solution

The fourth proportional to 438.80, 658.88 and 419.32 is: 629.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.80 : 658.88 = 419.32 : x
  2. Step 2: Convert to fraction form
    438.80/658.88 = 419.32/x
  3. Step 3: Cross multiply
    438.80x = 658.88 × 419.32
  4. Step 4: Simplify right side
    438.80x = 276,277.82
  5. Step 5: Solve for x
    x = 276,277.82/438.80
  6. Step 6: Final answer
    x = 629.63

Related Problems

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.