Home / 386.86-511.31

Finding the Third Proportional to 386.86 and 511.31

Calculator

Solution

The third proportional to 386.86 and 511.31 is: 675.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.86 : 511.31 = 511.31 : x
  2. Step 2: Convert to fraction form
    386.86/511.31 = 511.31/x
  3. Step 3: Cross multiply
    386.86x = 511.31 × 511.31
  4. Step 4: Simplify right side
    386.86x = 261,440.47
  5. Step 5: Solve for x
    x = 261,440.47/386.86
  6. Step 6: Final answer
    x = 675.80

Related Problems

Why These Related Problems?

These problems maintain the same ratio (1.32) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.