Finding the Fourth Proportional to 399,705.68, 551,587.20 and 218,413.74
Calculator
Solution
The fourth proportional to 399,705.68, 551,587.20 and 218,413.74 is: 301,407.33
Step by Step Solution
- Step 1: Write the proportion equation
399,705.68 : 551,587.20 = 218,413.74 : x - Step 2: Convert to fraction form
399,705.68/551,587.20 = 218,413.74/x - Step 3: Cross multiply
399,705.68x = 551,587.20 × 218,413.74 - Step 4: Simplify right side
399,705.68x = 120,474,223,288.13 - Step 5: Solve for x
x = 120,474,223,288.13/399,705.68 - Step 6: Final answer
x = 301,407.33
Related Problems
Find fourth proportional to 199,852.84, 275,793.60 and 109,206.87
Half scale
Find fourth proportional to 799,411.36, 1,103,174.40 and 436,827.48
Double scale
Find fourth proportional to 399,706.68, 551,588.58 and 218,414.74
Similar ratio
Find fourth proportional to 599,558.52, 827,380.80 and 327,620.61
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.