Home / 372.09-558.15-128.61

Finding the Fourth Proportional to 372.09, 558.15 and 128.61

Calculator

Solution

The fourth proportional to 372.09, 558.15 and 128.61 is: 192.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.09 : 558.15 = 128.61 : x
  2. Step 2: Convert to fraction form
    372.09/558.15 = 128.61/x
  3. Step 3: Cross multiply
    372.09x = 558.15 × 128.61
  4. Step 4: Simplify right side
    372.09x = 71,783.67
  5. Step 5: Solve for x
    x = 71,783.67/372.09
  6. Step 6: Final answer
    x = 192.92

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.