Finding the Fourth Proportional to 289.24, 398.93 and 172.80
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Solution
The fourth proportional to 289.24, 398.93 and 172.80 is: 238.33
Step by Step Solution
- Step 1: Write the proportion equation
289.24 : 398.93 = 172.80 : x - Step 2: Convert to fraction form
289.24/398.93 = 172.80/x - Step 3: Cross multiply
289.24x = 398.93 × 172.80 - Step 4: Simplify right side
289.24x = 68,934.24 - Step 5: Solve for x
x = 68,934.24/289.24 - Step 6: Final answer
x = 238.33
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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.