Finding the Fourth Proportional to 515,828.36, 711,912.66 and 289,486.28
Calculator
Solution
The fourth proportional to 515,828.36, 711,912.66 and 289,486.28 is: 399,530.08
Step by Step Solution
- Step 1: Write the proportion equation
515,828.36 : 711,912.66 = 289,486.28 : x - Step 2: Convert to fraction form
515,828.36/711,912.66 = 289,486.28/x - Step 3: Cross multiply
515,828.36x = 711,912.66 × 289,486.28 - Step 4: Simplify right side
515,828.36x = 206,088,947,628.31 - Step 5: Solve for x
x = 206,088,947,628.31/515,828.36 - Step 6: Final answer
x = 399,530.08
Related Problems
Find fourth proportional to 257,914.18, 355,956.33 and 144,743.14
Half scale
Find fourth proportional to 1,031,656.72, 1,423,825.32 and 578,972.56
Double scale
Find fourth proportional to 515,829.36, 711,914.04 and 289,487.28
Similar ratio
Find fourth proportional to 773,742.54, 1,067,868.99 and 434,229.42
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.