Finding the Fourth Proportional to 201.45, 278.09 and 170.53
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Solution
The fourth proportional to 201.45, 278.09 and 170.53 is: 235.40
Step by Step Solution
- Step 1: Write the proportion equation
201.45 : 278.09 = 170.53 : x - Step 2: Convert to fraction form
201.45/278.09 = 170.53/x - Step 3: Cross multiply
201.45x = 278.09 × 170.53 - Step 4: Simplify right side
201.45x = 47,420.44 - Step 5: Solve for x
x = 47,420.44/201.45 - Step 6: Final answer
x = 235.40
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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.