Finding the Fourth Proportional to 305,785.21, 421,997.70 and 169,819.75
Calculator
Solution
The fourth proportional to 305,785.21, 421,997.70 and 169,819.75 is: 234,359.09
Step by Step Solution
- Step 1: Write the proportion equation
305,785.21 : 421,997.70 = 169,819.75 : x - Step 2: Convert to fraction form
305,785.21/421,997.70 = 169,819.75/x - Step 3: Cross multiply
305,785.21x = 421,997.70 × 169,819.75 - Step 4: Simplify right side
305,785.21x = 71,663,543,914.58 - Step 5: Solve for x
x = 71,663,543,914.58/305,785.21 - Step 6: Final answer
x = 234,359.09
Related Problems
Find fourth proportional to 152,892.61, 210,998.85 and 84,909.88
Half scale
Find fourth proportional to 611,570.42, 843,995.40 and 339,639.50
Double scale
Find fourth proportional to 305,786.21, 421,999.08 and 169,820.75
Similar ratio
Find fourth proportional to 458,677.82, 632,996.55 and 254,729.63
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.