Finding the Fourth Proportional to 671.21, 926.26 and 387.63
Calculator
Solution
The fourth proportional to 671.21, 926.26 and 387.63 is: 534.92
Step by Step Solution
- Step 1: Write the proportion equation
671.21 : 926.26 = 387.63 : x - Step 2: Convert to fraction form
671.21/926.26 = 387.63/x - Step 3: Cross multiply
671.21x = 926.26 × 387.63 - Step 4: Simplify right side
671.21x = 359,045.19 - Step 5: Solve for x
x = 359,045.19/671.21 - Step 6: Final answer
x = 534.92
Related Problems
Find fourth proportional to 335.61, 463.13 and 193.82
Half scale
Find fourth proportional to 1,342.43, 1,852.52 and 775.26
Double scale
Find fourth proportional to 672.21, 927.64 and 388.63
Similar ratio
Find fourth proportional to 1,006.82, 1,389.39 and 581.45
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.