Finding the Fourth Proportional to 279.79, 418.99 and 157.82
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Solution
The fourth proportional to 279.79, 418.99 and 157.82 is: 236.33
Step by Step Solution
- Step 1: Write the proportion equation
279.79 : 418.99 = 157.82 : x - Step 2: Convert to fraction form
279.79/418.99 = 157.82/x - Step 3: Cross multiply
279.79x = 418.99 × 157.82 - Step 4: Simplify right side
279.79x = 66,122.81 - Step 5: Solve for x
x = 66,122.81/279.79 - Step 6: Final answer
x = 236.33
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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.