Finding the Fourth Proportional to 739,212.08, 1,108,937.79 and 289,689.21
Calculator
Solution
The fourth proportional to 739,212.08, 1,108,937.79 and 289,689.21 is: 434,580.72
Step by Step Solution
- Step 1: Write the proportion equation
739,212.08 : 1,108,937.79 = 289,689.21 : x - Step 2: Convert to fraction form
739,212.08/1,108,937.79 = 289,689.21/x - Step 3: Cross multiply
739,212.08x = 1,108,937.79 × 289,689.21 - Step 4: Simplify right side
739,212.08x = 321,247,312,324.25 - Step 5: Solve for x
x = 321,247,312,324.25/739,212.08 - Step 6: Final answer
x = 434,580.72
Related Problems
Find fourth proportional to 369,606.04, 554,468.90 and 144,844.61
Half scale
Find fourth proportional to 1,478,424.15, 2,217,875.58 and 579,378.42
Double scale
Find fourth proportional to 739,213.08, 1,108,939.29 and 289,690.21
Similar ratio
Find fourth proportional to 1,108,818.11, 1,663,406.69 and 434,533.82
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.