Home / 256,328-388,315

Finding the Third Proportional to 256,328 and 388,315

Calculator

Solution

The third proportional to 256,328 and 388,315 is: 588,264.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,328 : 388,315 = 388,315 : x
  2. Step 2: Convert to fraction form
    256,328/388,315 = 388,315/x
  3. Step 3: Cross multiply
    256,328x = 388,315 × 388,315
  4. Step 4: Simplify right side
    256,328x = 150,788,539,225
  5. Step 5: Solve for x
    x = 150,788,539,225/256,328
  6. Step 6: Final answer
    x = 588,264.02

Related Problems

Find third proportional to 128,164 and 194,157.50
Half scale
Find third proportional to 512,656 and 776,630
Double scale
Find third proportional to 256,330 and 388,318
Similar ratio
Find third proportional to 384,492 and 582,472.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.