Finding the Fourth Proportional to 644,343.30, 889,204.74 and 353,967.12
Calculator
Solution
The fourth proportional to 644,343.30, 889,204.74 and 353,967.12 is: 488,480.66
Step by Step Solution
- Step 1: Write the proportion equation
644,343.30 : 889,204.74 = 353,967.12 : x - Step 2: Convert to fraction form
644,343.30/889,204.74 = 353,967.12/x - Step 3: Cross multiply
644,343.30x = 889,204.74 × 353,967.12 - Step 4: Simplify right side
644,343.30x = 314,749,240,908.15 - Step 5: Solve for x
x = 314,749,240,908.15/644,343.30 - Step 6: Final answer
x = 488,480.66
Related Problems
Find fourth proportional to 322,171.65, 444,602.37 and 176,983.56
Half scale
Find fourth proportional to 1,288,686.60, 1,778,409.48 and 707,934.24
Double scale
Find fourth proportional to 644,344.30, 889,206.12 and 353,968.12
Similar ratio
Find fourth proportional to 966,514.95, 1,333,807.11 and 530,950.68
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.