Finding the Fourth Proportional to 319,229.80, 478,844.70 and 257,021.80
Calculator
Solution
The fourth proportional to 319,229.80, 478,844.70 and 257,021.80 is: 385,532.70
Step by Step Solution
- Step 1: Write the proportion equation
319,229.80 : 478,844.70 = 257,021.80 : x - Step 2: Convert to fraction form
319,229.80/478,844.70 = 257,021.80/x - Step 3: Cross multiply
319,229.80x = 478,844.70 × 257,021.80 - Step 4: Simplify right side
319,229.80x = 123,073,526,714.46 - Step 5: Solve for x
x = 123,073,526,714.46/319,229.80 - Step 6: Final answer
x = 385,532.70
Related Problems
Find fourth proportional to 159,614.90, 239,422.35 and 128,510.90
Half scale
Find fourth proportional to 638,459.60, 957,689.40 and 514,043.60
Double scale
Find fourth proportional to 319,230.80, 478,846.20 and 257,022.80
Similar ratio
Find fourth proportional to 478,844.70, 718,267.05 and 385,532.70
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.