Home / 178.45-386.86

Finding the Third Proportional to 178.45 and 386.86

Calculator

Solution

The third proportional to 178.45 and 386.86 is: 838.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    178.45 : 386.86 = 386.86 : x
  2. Step 2: Convert to fraction form
    178.45/386.86 = 386.86/x
  3. Step 3: Cross multiply
    178.45x = 386.86 × 386.86
  4. Step 4: Simplify right side
    178.45x = 149,660.18
  5. Step 5: Solve for x
    x = 149,660.18/178.45
  6. Step 6: Final answer
    x = 838.65

Related Problems

Find third proportional to 89.23 and 193.43
Half scale
Find third proportional to 356.91 and 773.72
Double scale
Find third proportional to 180 and 391
Similar ratio
Find third proportional to 267.68 and 580.29
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.