Finding the Fourth Proportional to 218.99, 302.13 and 145.18
Calculator
Solution
The fourth proportional to 218.99, 302.13 and 145.18 is: 200.30
Step by Step Solution
- Step 1: Write the proportion equation
218.99 : 302.13 = 145.18 : x - Step 2: Convert to fraction form
218.99/302.13 = 145.18/x - Step 3: Cross multiply
218.99x = 302.13 × 145.18 - Step 4: Simplify right side
218.99x = 43,863.23 - Step 5: Solve for x
x = 43,863.23/218.99 - Step 6: Final answer
x = 200.30
Related Problems
Find fourth proportional to 109.50, 151.07 and 72.59
Half scale
Find fourth proportional to 437.98, 604.26 and 290.36
Double scale
Find fourth proportional to 219.99, 303.51 and 146.18
Similar ratio
Find fourth proportional to 328.49, 453.20 and 217.77
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.