Finding the Fourth Proportional to 513,749.40, 709,259.21 and 309,851.75
Calculator
Solution
The fourth proportional to 513,749.40, 709,259.21 and 309,851.75 is: 427,767.32
Step by Step Solution
- Step 1: Write the proportion equation
513,749.40 : 709,259.21 = 309,851.75 : x - Step 2: Convert to fraction form
513,749.40/709,259.21 = 309,851.75/x - Step 3: Cross multiply
513,749.40x = 709,259.21 × 309,851.75 - Step 4: Simplify right side
513,749.40x = 219,765,202,326.56 - Step 5: Solve for x
x = 219,765,202,326.56/513,749.40 - Step 6: Final answer
x = 427,767.32
Related Problems
Find fourth proportional to 256,874.70, 354,629.60 and 154,925.87
Half scale
Find fourth proportional to 1,027,498.80, 1,418,518.41 and 619,703.49
Double scale
Find fourth proportional to 513,750.40, 709,260.59 and 309,852.75
Similar ratio
Find fourth proportional to 770,624.10, 1,063,888.81 and 464,777.62
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.