Finding the Fourth Proportional to 305.11, 420.93 and 194.55
Calculator
Solution
The fourth proportional to 305.11, 420.93 and 194.55 is: 268.40
Step by Step Solution
- Step 1: Write the proportion equation
305.11 : 420.93 = 194.55 : x - Step 2: Convert to fraction form
305.11/420.93 = 194.55/x - Step 3: Cross multiply
305.11x = 420.93 × 194.55 - Step 4: Simplify right side
305.11x = 81,891.93 - Step 5: Solve for x
x = 81,891.93/305.11 - Step 6: Final answer
x = 268.40
Related Problems
Find fourth proportional to 152.56, 210.47 and 97.28
Half scale
Find fourth proportional to 610.22, 841.86 and 389.10
Double scale
Find fourth proportional to 306.11, 422.31 and 195.55
Similar ratio
Find fourth proportional to 457.67, 631.40 and 291.83
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.