Finding the Fourth Proportional to 1,021.02, 1,409.08 and 628
Calculator
Solution
The fourth proportional to 1,021.02, 1,409.08 and 628 is: 866.68
Step by Step Solution
- Step 1: Write the proportion equation
1,021.02 : 1,409.08 = 628 : x - Step 2: Convert to fraction form
1,021.02/1,409.08 = 628/x - Step 3: Cross multiply
1,021.02x = 1,409.08 × 628 - Step 4: Simplify right side
1,021.02x = 884,902.24 - Step 5: Solve for x
x = 884,902.24/1,021.02 - Step 6: Final answer
x = 866.68
Related Problems
Find fourth proportional to 510.51, 704.54 and 314
Half scale
Find fourth proportional to 2,042.04, 2,818.16 and 1,256
Double scale
Find fourth proportional to 1,022.02, 1,410.46 and 629
Similar ratio
Find fourth proportional to 1,531.53, 2,113.62 and 942
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.