Finding the Third Proportional to 258,688.13 and 386,439.19
Calculator
Solution
The third proportional to 258,688.13 and 386,439.19 is: 577,279.09
Step by Step Solution
- Step 1: Write the proportion equation
258,688.13 : 386,439.19 = 386,439.19 : x - Step 2: Convert to fraction form
258,688.13/386,439.19 = 386,439.19/x - Step 3: Cross multiply
258,688.13x = 386,439.19 × 386,439.19 - Step 4: Simplify right side
258,688.13x = 149,335,245,635.66 - Step 5: Solve for x
x = 149,335,245,635.66/258,688.13 - Step 6: Final answer
x = 577,279.09
Related Problems
Find third proportional to 129,344.06 and 193,219.59
Half scale
Find third proportional to 517,376.25 and 772,878.38
Double scale
Find third proportional to 258,690 and 386,442
Similar ratio
Find third proportional to 388,032.19 and 579,658.78
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.