Finding the Fourth Proportional to 419.97, 630.02 and 145.99
Calculator
Solution
The fourth proportional to 419.97, 630.02 and 145.99 is: 219.00
Step by Step Solution
- Step 1: Write the proportion equation
419.97 : 630.02 = 145.99 : x - Step 2: Convert to fraction form
419.97/630.02 = 145.99/x - Step 3: Cross multiply
419.97x = 630.02 × 145.99 - Step 4: Simplify right side
419.97x = 91,975.41 - Step 5: Solve for x
x = 91,975.41/419.97 - Step 6: Final answer
x = 219.00
Related Problems
Find fourth proportional to 209.99, 315.01 and 72.99
Half scale
Find fourth proportional to 839.94, 1,260.05 and 291.98
Double scale
Find fourth proportional to 420.97, 631.52 and 146.99
Similar ratio
Find fourth proportional to 629.96, 945.03 and 218.98
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.