Finding the Fourth Proportional to 978, 1,467.12 and 294
Calculator
Solution
The fourth proportional to 978, 1,467.12 and 294 is: 441.04
Step by Step Solution
- Step 1: Write the proportion equation
978 : 1,467.12 = 294 : x - Step 2: Convert to fraction form
978/1,467.12 = 294/x - Step 3: Cross multiply
978x = 1,467.12 × 294 - Step 4: Simplify right side
978x = 431,333.28 - Step 5: Solve for x
x = 431,333.28/978 - Step 6: Final answer
x = 441.04
Related Problems
Find fourth proportional to 489, 733.56 and 147
Half scale
Find fourth proportional to 1,956, 2,934.24 and 588
Double scale
Find fourth proportional to 979, 1,468.62 and 295
Similar ratio
Find fourth proportional to 1,467, 2,200.68 and 441
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.