Finding the Fourth Proportional to 415.26, 618.91 and 397.17
Calculator
Solution
The fourth proportional to 415.26, 618.91 and 397.17 is: 591.95
Step by Step Solution
- Step 1: Write the proportion equation
415.26 : 618.91 = 397.17 : x - Step 2: Convert to fraction form
415.26/618.91 = 397.17/x - Step 3: Cross multiply
415.26x = 618.91 × 397.17 - Step 4: Simplify right side
415.26x = 245,811.49 - Step 5: Solve for x
x = 245,811.49/415.26 - Step 6: Final answer
x = 591.95
Related Problems
Find fourth proportional to 207.63, 309.45 and 198.59
Half scale
Find fourth proportional to 830.52, 1,237.82 and 794.34
Double scale
Find fourth proportional to 416.26, 620.40 and 398.17
Similar ratio
Find fourth proportional to 622.89, 928.36 and 595.76
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.