Finding the Fourth Proportional to 689.94, 951.70 and 409.99
Calculator
Solution
The fourth proportional to 689.94, 951.70 and 409.99 is: 565.53
Step by Step Solution
- Step 1: Write the proportion equation
689.94 : 951.70 = 409.99 : x - Step 2: Convert to fraction form
689.94/951.70 = 409.99/x - Step 3: Cross multiply
689.94x = 951.70 × 409.99 - Step 4: Simplify right side
689.94x = 390,184.08 - Step 5: Solve for x
x = 390,184.08/689.94 - Step 6: Final answer
x = 565.53
Related Problems
Find fourth proportional to 344.97, 475.85 and 204.99
Half scale
Find fourth proportional to 1,379.88, 1,903.40 and 819.98
Double scale
Find fourth proportional to 690.94, 953.08 and 410.99
Similar ratio
Find fourth proportional to 1,034.91, 1,427.55 and 614.98
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.