Finding the Fourth Proportional to 685,431.36, 945,924.81 and 379,507.71
Calculator
Solution
The fourth proportional to 685,431.36, 945,924.81 and 379,507.71 is: 523,736.99
Step by Step Solution
- Step 1: Write the proportion equation
685,431.36 : 945,924.81 = 379,507.71 : x - Step 2: Convert to fraction form
685,431.36/945,924.81 = 379,507.71/x - Step 3: Cross multiply
685,431.36x = 945,924.81 × 379,507.71 - Step 4: Simplify right side
685,431.36x = 358,985,758,475.29 - Step 5: Solve for x
x = 358,985,758,475.29/685,431.36 - Step 6: Final answer
x = 523,736.99
Related Problems
Find fourth proportional to 342,715.68, 472,962.41 and 189,753.86
Half scale
Find fourth proportional to 1,370,862.72, 1,891,849.62 and 759,015.42
Double scale
Find fourth proportional to 685,432.36, 945,926.19 and 379,508.71
Similar ratio
Find fourth proportional to 1,028,147.04, 1,418,887.22 and 569,261.57
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.