Finding the Fourth Proportional to 306.99, 423.46 and 202.09
Calculator
Solution
The fourth proportional to 306.99, 423.46 and 202.09 is: 278.76
Step by Step Solution
- Step 1: Write the proportion equation
306.99 : 423.46 = 202.09 : x - Step 2: Convert to fraction form
306.99/423.46 = 202.09/x - Step 3: Cross multiply
306.99x = 423.46 × 202.09 - Step 4: Simplify right side
306.99x = 85,575.47 - Step 5: Solve for x
x = 85,575.47/306.99 - Step 6: Final answer
x = 278.76
Related Problems
Find fourth proportional to 153.50, 211.73 and 101.04
Half scale
Find fourth proportional to 613.98, 846.92 and 404.18
Double scale
Find fourth proportional to 307.99, 424.84 and 203.09
Similar ratio
Find fourth proportional to 460.49, 635.19 and 303.13
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.