Home / 258,856-402,108

Finding the Third Proportional to 258,856 and 402,108

Calculator

Solution

The third proportional to 258,856 and 402,108 is: 624,636.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,856 : 402,108 = 402,108 : x
  2. Step 2: Convert to fraction form
    258,856/402,108 = 402,108/x
  3. Step 3: Cross multiply
    258,856x = 402,108 × 402,108
  4. Step 4: Simplify right side
    258,856x = 161,690,843,664
  5. Step 5: Solve for x
    x = 161,690,843,664/258,856
  6. Step 6: Final answer
    x = 624,636.26

Related Problems

Find third proportional to 129,428 and 201,054
Half scale
Find third proportional to 517,712 and 804,216
Double scale
Find third proportional to 258,858 and 402,111
Similar ratio
Find third proportional to 388,284 and 603,162
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.