Home / 290,007-408,400.50

Finding the Third Proportional to 290,007 and 408,400.50

Calculator

Solution

The third proportional to 290,007 and 408,400.50 is: 575,127.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,007 : 408,400.50 = 408,400.50 : x
  2. Step 2: Convert to fraction form
    290,007/408,400.50 = 408,400.50/x
  3. Step 3: Cross multiply
    290,007x = 408,400.50 × 408,400.50
  4. Step 4: Simplify right side
    290,007x = 166,790,968,400.25
  5. Step 5: Solve for x
    x = 166,790,968,400.25/290,007
  6. Step 6: Final answer
    x = 575,127.39

Related Problems

Find third proportional to 145,003.50 and 204,200.25
Half scale
Find third proportional to 580,014 and 816,801
Double scale
Find third proportional to 290,009 and 408,403
Similar ratio
Find third proportional to 435,010.50 and 612,600.75
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.