Home / 172,130-378,340

Finding the Third Proportional to 172,130 and 378,340

Calculator

Solution

The third proportional to 172,130 and 378,340 is: 831,587.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,130 : 378,340 = 378,340 : x
  2. Step 2: Convert to fraction form
    172,130/378,340 = 378,340/x
  3. Step 3: Cross multiply
    172,130x = 378,340 × 378,340
  4. Step 4: Simplify right side
    172,130x = 143,141,155,600
  5. Step 5: Solve for x
    x = 143,141,155,600/172,130
  6. Step 6: Final answer
    x = 831,587.50

Related Problems

Find third proportional to 86,065 and 189,170
Half scale
Find third proportional to 344,260 and 756,680
Double scale
Find third proportional to 172,132 and 378,344
Similar ratio
Find third proportional to 258,195 and 567,510
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.