Home / 256,792-399,176

Finding the Third Proportional to 256,792 and 399,176

Calculator

Solution

The third proportional to 256,792 and 399,176 is: 620,507.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,792 : 399,176 = 399,176 : x
  2. Step 2: Convert to fraction form
    256,792/399,176 = 399,176/x
  3. Step 3: Cross multiply
    256,792x = 399,176 × 399,176
  4. Step 4: Simplify right side
    256,792x = 159,341,478,976
  5. Step 5: Solve for x
    x = 159,341,478,976/256,792
  6. Step 6: Final answer
    x = 620,507.96

Related Problems

Find third proportional to 128,396 and 199,588
Half scale
Find third proportional to 513,584 and 798,352
Double scale
Find third proportional to 256,794 and 399,179
Similar ratio
Find third proportional to 385,188 and 598,764
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.