Home / 258,606-399,411

Finding the Third Proportional to 258,606 and 399,411

Calculator

Solution

The third proportional to 258,606 and 399,411 is: 616,881.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,606 : 399,411 = 399,411 : x
  2. Step 2: Convert to fraction form
    258,606/399,411 = 399,411/x
  3. Step 3: Cross multiply
    258,606x = 399,411 × 399,411
  4. Step 4: Simplify right side
    258,606x = 159,529,146,921
  5. Step 5: Solve for x
    x = 159,529,146,921/258,606
  6. Step 6: Final answer
    x = 616,881.07

Related Problems

Find third proportional to 129,303 and 199,705.50
Half scale
Find third proportional to 517,212 and 798,822
Double scale
Find third proportional to 258,608 and 399,414
Similar ratio
Find third proportional to 387,909 and 599,116.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.