Home / 256,640-618,270

Finding the Third Proportional to 256,640 and 618,270

Calculator

Solution

The third proportional to 256,640 and 618,270 is: 1,489,470.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,640 : 618,270 = 618,270 : x
  2. Step 2: Convert to fraction form
    256,640/618,270 = 618,270/x
  3. Step 3: Cross multiply
    256,640x = 618,270 × 618,270
  4. Step 4: Simplify right side
    256,640x = 382,257,792,900
  5. Step 5: Solve for x
    x = 382,257,792,900/256,640
  6. Step 6: Final answer
    x = 1,489,470.83

Related Problems

Find third proportional to 128,320 and 309,135
Half scale
Find third proportional to 513,280 and 1,236,540
Double scale
Find third proportional to 256,642 and 618,275
Similar ratio
Find third proportional to 384,960 and 927,405
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.