Finding the Fourth Proportional to 717,888.79, 990,673.77 and 391,204.65
Calculator
Solution
The fourth proportional to 717,888.79, 990,673.77 and 391,204.65 is: 539,855.47
Step by Step Solution
- Step 1: Write the proportion equation
717,888.79 : 990,673.77 = 391,204.65 : x - Step 2: Convert to fraction form
717,888.79/990,673.77 = 391,204.65/x - Step 3: Cross multiply
717,888.79x = 990,673.77 × 391,204.65 - Step 4: Simplify right side
717,888.79x = 387,556,190,639.08 - Step 5: Solve for x
x = 387,556,190,639.08/717,888.79 - Step 6: Final answer
x = 539,855.47
Related Problems
Find fourth proportional to 358,944.40, 495,336.89 and 195,602.33
Half scale
Find fourth proportional to 1,435,777.58, 1,981,347.55 and 782,409.31
Double scale
Find fourth proportional to 717,889.79, 990,675.15 and 391,205.65
Similar ratio
Find fourth proportional to 1,076,833.19, 1,486,010.66 and 586,806.98
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.