Home / 258,064-398,760

Finding the Third Proportional to 258,064 and 398,760

Calculator

Solution

The third proportional to 258,064 and 398,760 is: 616,163.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,064 : 398,760 = 398,760 : x
  2. Step 2: Convert to fraction form
    258,064/398,760 = 398,760/x
  3. Step 3: Cross multiply
    258,064x = 398,760 × 398,760
  4. Step 4: Simplify right side
    258,064x = 159,009,537,600
  5. Step 5: Solve for x
    x = 159,009,537,600/258,064
  6. Step 6: Final answer
    x = 616,163.19

Related Problems

Find third proportional to 129,032 and 199,380
Half scale
Find third proportional to 516,128 and 797,520
Double scale
Find third proportional to 258,066 and 398,763
Similar ratio
Find third proportional to 387,096 and 598,140
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.