Finding the Third Proportional to 390,990.75 and 913,470.75
Calculator
Solution
The third proportional to 390,990.75 and 913,470.75 is: 2,134,139.52
Step by Step Solution
- Step 1: Write the proportion equation
390,990.75 : 913,470.75 = 913,470.75 : x - Step 2: Convert to fraction form
390,990.75/913,470.75 = 913,470.75/x - Step 3: Cross multiply
390,990.75x = 913,470.75 × 913,470.75 - Step 4: Simplify right side
390,990.75x = 834,428,811,105.56 - Step 5: Solve for x
x = 834,428,811,105.56/390,990.75 - Step 6: Final answer
x = 2,134,139.52
Related Problems
Find third proportional to 195,495.38 and 456,735.38
Half scale
Find third proportional to 781,981.50 and 1,826,941.50
Double scale
Find third proportional to 390,993 and 913,475
Similar ratio
Find third proportional to 586,486.13 and 1,370,206.13
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (2.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.