Finding the Fourth Proportional to 612.97, 918.94 and 339.07
Calculator
Solution
The fourth proportional to 612.97, 918.94 and 339.07 is: 508.32
Step by Step Solution
- Step 1: Write the proportion equation
612.97 : 918.94 = 339.07 : x - Step 2: Convert to fraction form
612.97/918.94 = 339.07/x - Step 3: Cross multiply
612.97x = 918.94 × 339.07 - Step 4: Simplify right side
612.97x = 311,584.99 - Step 5: Solve for x
x = 311,584.99/612.97 - Step 6: Final answer
x = 508.32
Related Problems
Find fourth proportional to 306.49, 459.47 and 169.54
Half scale
Find fourth proportional to 1,225.94, 1,837.88 and 678.14
Double scale
Find fourth proportional to 613.97, 920.44 and 340.07
Similar ratio
Find fourth proportional to 919.46, 1,378.41 and 508.61
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.