Home / 128,180-281,320

Finding the Third Proportional to 128,180 and 281,320

Calculator

Solution

The third proportional to 128,180 and 281,320 is: 617,420.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,180 : 281,320 = 281,320 : x
  2. Step 2: Convert to fraction form
    128,180/281,320 = 281,320/x
  3. Step 3: Cross multiply
    128,180x = 281,320 × 281,320
  4. Step 4: Simplify right side
    128,180x = 79,140,942,400
  5. Step 5: Solve for x
    x = 79,140,942,400/128,180
  6. Step 6: Final answer
    x = 617,420.37

Related Problems

Find third proportional to 64,090 and 140,660
Half scale
Find third proportional to 256,360 and 562,640
Double scale
Find third proportional to 128,182 and 281,324
Similar ratio
Find third proportional to 192,270 and 421,980
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.