Home / 266,603-408,813

Finding the Third Proportional to 266,603 and 408,813

Calculator

Solution

The third proportional to 266,603 and 408,813 is: 626,879.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,603 : 408,813 = 408,813 : x
  2. Step 2: Convert to fraction form
    266,603/408,813 = 408,813/x
  3. Step 3: Cross multiply
    266,603x = 408,813 × 408,813
  4. Step 4: Simplify right side
    266,603x = 167,128,068,969
  5. Step 5: Solve for x
    x = 167,128,068,969/266,603
  6. Step 6: Final answer
    x = 626,879.93

Related Problems

Find third proportional to 133,301.50 and 204,406.50
Half scale
Find third proportional to 533,206 and 817,626
Double scale
Find third proportional to 266,605 and 408,816
Similar ratio
Find third proportional to 399,904.50 and 613,219.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.