Finding the Fourth Proportional to 528,638.43, 729,521.75 and 286,920.94
Calculator
Solution
The fourth proportional to 528,638.43, 729,521.75 and 286,920.94 is: 395,951.28
Step by Step Solution
- Step 1: Write the proportion equation
528,638.43 : 729,521.75 = 286,920.94 : x - Step 2: Convert to fraction form
528,638.43/729,521.75 = 286,920.94/x - Step 3: Cross multiply
528,638.43x = 729,521.75 × 286,920.94 - Step 4: Simplify right side
528,638.43x = 209,315,064,907.87 - Step 5: Solve for x
x = 209,315,064,907.87/528,638.43 - Step 6: Final answer
x = 395,951.28
Related Problems
Find fourth proportional to 264,319.22, 364,760.87 and 143,460.47
Half scale
Find fourth proportional to 1,057,276.87, 1,459,043.49 and 573,841.88
Double scale
Find fourth proportional to 528,639.43, 729,523.13 and 286,921.94
Similar ratio
Find fourth proportional to 792,957.65, 1,094,282.62 and 430,381.41
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.