Finding the Fourth Proportional to 398.70, 550.23 and 221.68
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Solution
The fourth proportional to 398.70, 550.23 and 221.68 is: 305.93
Step by Step Solution
- Step 1: Write the proportion equation
398.70 : 550.23 = 221.68 : x - Step 2: Convert to fraction form
398.70/550.23 = 221.68/x - Step 3: Cross multiply
398.70x = 550.23 × 221.68 - Step 4: Simplify right side
398.70x = 121,971.13 - Step 5: Solve for x
x = 121,971.13/398.70 - Step 6: Final answer
x = 305.93
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.