Home / 254.30-381.51-71.69

Finding the Fourth Proportional to 254.30, 381.51 and 71.69

Calculator

Solution

The fourth proportional to 254.30, 381.51 and 71.69 is: 107.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    254.30 : 381.51 = 71.69 : x
  2. Step 2: Convert to fraction form
    254.30/381.51 = 71.69/x
  3. Step 3: Cross multiply
    254.30x = 381.51 × 71.69
  4. Step 4: Simplify right side
    254.30x = 27,350.45
  5. Step 5: Solve for x
    x = 27,350.45/254.30
  6. Step 6: Final answer
    x = 107.55

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.