Finding the Fourth Proportional to 398.74, 550.21 and 232.98
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Solution
The fourth proportional to 398.74, 550.21 and 232.98 is: 321.48
Step by Step Solution
- Step 1: Write the proportion equation
398.74 : 550.21 = 232.98 : x - Step 2: Convert to fraction form
398.74/550.21 = 232.98/x - Step 3: Cross multiply
398.74x = 550.21 × 232.98 - Step 4: Simplify right side
398.74x = 128,187.93 - Step 5: Solve for x
x = 128,187.93/398.74 - Step 6: Final answer
x = 321.48
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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.