Finding the Fourth Proportional to 609.19, 913.79 and 198.68
Calculator
Solution
The fourth proportional to 609.19, 913.79 and 198.68 is: 298.02
Step by Step Solution
- Step 1: Write the proportion equation
609.19 : 913.79 = 198.68 : x - Step 2: Convert to fraction form
609.19/913.79 = 198.68/x - Step 3: Cross multiply
609.19x = 913.79 × 198.68 - Step 4: Simplify right side
609.19x = 181,547.72 - Step 5: Solve for x
x = 181,547.72/609.19 - Step 6: Final answer
x = 298.02
Related Problems
Find fourth proportional to 304.59, 456.90 and 99.34
Half scale
Find fourth proportional to 1,218.38, 1,827.59 and 397.35
Double scale
Find fourth proportional to 610.19, 915.29 and 199.68
Similar ratio
Find fourth proportional to 913.78, 1,370.69 and 298.01
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.