Finding the Fourth Proportional to 310,990.05, 429,298.68 and 209,074.62
Calculator
Solution
The fourth proportional to 310,990.05, 429,298.68 and 209,074.62 is: 288,611.99
Step by Step Solution
- Step 1: Write the proportion equation
310,990.05 : 429,298.68 = 209,074.62 : x - Step 2: Convert to fraction form
310,990.05/429,298.68 = 209,074.62/x - Step 3: Cross multiply
310,990.05x = 429,298.68 × 209,074.62 - Step 4: Simplify right side
310,990.05x = 89,755,458,387.50 - Step 5: Solve for x
x = 89,755,458,387.50/310,990.05 - Step 6: Final answer
x = 288,611.99
Related Problems
Find fourth proportional to 155,495.03, 214,649.34 and 104,537.31
Half scale
Find fourth proportional to 621,980.10, 858,597.36 and 418,149.24
Double scale
Find fourth proportional to 310,991.05, 429,300.06 and 209,075.62
Similar ratio
Find fourth proportional to 466,485.08, 643,948.02 and 313,611.93
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.