Finding the Fourth Proportional to 1,305.08, 1,956 and 646.26
Calculator
Solution
The fourth proportional to 1,305.08, 1,956 and 646.26 is: 968.59
Step by Step Solution
- Step 1: Write the proportion equation
1,305.08 : 1,956 = 646.26 : x - Step 2: Convert to fraction form
1,305.08/1,956 = 646.26/x - Step 3: Cross multiply
1,305.08x = 1,956 × 646.26 - Step 4: Simplify right side
1,305.08x = 1,264,084.56 - Step 5: Solve for x
x = 1,264,084.56/1,305.08 - Step 6: Final answer
x = 968.59
Related Problems
Find fourth proportional to 652.54, 978 and 323.13
Half scale
Find fourth proportional to 2,610.16, 3,912 and 1,292.52
Double scale
Find fourth proportional to 1,306.08, 1,957.50 and 647.26
Similar ratio
Find fourth proportional to 1,957.62, 2,934 and 969.39
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.