Finding the Fourth Proportional to 201.49, 278.18 and 157.15
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Solution
The fourth proportional to 201.49, 278.18 and 157.15 is: 216.96
Step by Step Solution
- Step 1: Write the proportion equation
201.49 : 278.18 = 157.15 : x - Step 2: Convert to fraction form
201.49/278.18 = 157.15/x - Step 3: Cross multiply
201.49x = 278.18 × 157.15 - Step 4: Simplify right side
201.49x = 43,714.99 - Step 5: Solve for x
x = 43,714.99/201.49 - Step 6: Final answer
x = 216.96
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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.