Home / 356,770-489,228

Finding the Third Proportional to 356,770 and 489,228

Calculator

Solution

The third proportional to 356,770 and 489,228 is: 670,863.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,770 : 489,228 = 489,228 : x
  2. Step 2: Convert to fraction form
    356,770/489,228 = 489,228/x
  3. Step 3: Cross multiply
    356,770x = 489,228 × 489,228
  4. Step 4: Simplify right side
    356,770x = 239,344,035,984
  5. Step 5: Solve for x
    x = 239,344,035,984/356,770
  6. Step 6: Final answer
    x = 670,863.68

Related Problems

Find third proportional to 178,385 and 244,614
Half scale
Find third proportional to 713,540 and 978,456
Double scale
Find third proportional to 356,772 and 489,231
Similar ratio
Find third proportional to 535,155 and 733,842
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.