Home / 257,538-398,766

Finding the Third Proportional to 257,538 and 398,766

Calculator

Solution

The third proportional to 257,538 and 398,766 is: 617,440.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,538 : 398,766 = 398,766 : x
  2. Step 2: Convert to fraction form
    257,538/398,766 = 398,766/x
  3. Step 3: Cross multiply
    257,538x = 398,766 × 398,766
  4. Step 4: Simplify right side
    257,538x = 159,014,322,756
  5. Step 5: Solve for x
    x = 159,014,322,756/257,538
  6. Step 6: Final answer
    x = 617,440.23

Related Problems

Find third proportional to 128,769 and 199,383
Half scale
Find third proportional to 515,076 and 797,532
Double scale
Find third proportional to 257,540 and 398,769
Similar ratio
Find third proportional to 386,307 and 598,149
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.