Finding the Fourth Proportional to 463.18, 639.18 and 276.68
Calculator
Solution
The fourth proportional to 463.18, 639.18 and 276.68 is: 381.81
Step by Step Solution
- Step 1: Write the proportion equation
463.18 : 639.18 = 276.68 : x - Step 2: Convert to fraction form
463.18/639.18 = 276.68/x - Step 3: Cross multiply
463.18x = 639.18 × 276.68 - Step 4: Simplify right side
463.18x = 176,845.13 - Step 5: Solve for x
x = 176,845.13/463.18 - Step 6: Final answer
x = 381.81
Related Problems
Find fourth proportional to 231.59, 319.59 and 138.34
Half scale
Find fourth proportional to 926.36, 1,278.36 and 553.35
Double scale
Find fourth proportional to 464.18, 640.56 and 277.68
Similar ratio
Find fourth proportional to 694.77, 958.77 and 415.01
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.