Home / 256.86-385.17-92.31

Finding the Fourth Proportional to 256.86, 385.17 and 92.31

Calculator

Solution

The fourth proportional to 256.86, 385.17 and 92.31 is: 138.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    256.86 : 385.17 = 92.31 : x
  2. Step 2: Convert to fraction form
    256.86/385.17 = 92.31/x
  3. Step 3: Cross multiply
    256.86x = 385.17 × 92.31
  4. Step 4: Simplify right side
    256.86x = 35,555.04
  5. Step 5: Solve for x
    x = 35,555.04/256.86
  6. Step 6: Final answer
    x = 138.42

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.