Home / 381.25-525.75-231.89

Finding the Fourth Proportional to 381.25, 525.75 and 231.89

Calculator

Solution

The fourth proportional to 381.25, 525.75 and 231.89 is: 319.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.25 : 525.75 = 231.89 : x
  2. Step 2: Convert to fraction form
    381.25/525.75 = 231.89/x
  3. Step 3: Cross multiply
    381.25x = 525.75 × 231.89
  4. Step 4: Simplify right side
    381.25x = 121,917.48
  5. Step 5: Solve for x
    x = 121,917.48/381.25
  6. Step 6: Final answer
    x = 319.79

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.