Finding the Fourth Proportional to 810,431,364.92, 1,215,349,258.74 and 278,491,936.12
Calculator
Solution
The fourth proportional to 810,431,364.92, 1,215,349,258.74 and 278,491,936.12 is: 417,635,573.82
Step by Step Solution
- Step 1: Write the proportion equation
810,431,364.92 : 1,215,349,258.74 = 278,491,936.12 : x - Step 2: Convert to fraction form
810,431,364.92/1,215,349,258.74 = 278,491,936.12/x - Step 3: Cross multiply
810,431,364.92x = 1,215,349,258.74 × 278,491,936.12 - Step 4: Simplify right side
810,431,364.92x = 338,464,968,128,509,440 - Step 5: Solve for x
x = 338,464,968,128,509,440/810,431,364.92 - Step 6: Final answer
x = 417,635,573.82
Related Problems
Find fourth proportional to 405,215,682.46, 607,674,629.37 and 139,245,968.06
Half scale
Find fourth proportional to 1,620,862,729.84, 2,430,698,517.48 and 556,983,872.24
Double scale
Find fourth proportional to 810,431,365.92, 1,215,349,260.24 and 278,491,937.12
Similar ratio
Find fourth proportional to 1,215,647,047.38, 1,823,023,888.11 and 417,737,904.18
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.