Finding the Fourth Proportional to 438.41, 657.63 and 178.53
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Solution
The fourth proportional to 438.41, 657.63 and 178.53 is: 267.80
Step by Step Solution
- Step 1: Write the proportion equation
438.41 : 657.63 = 178.53 : x - Step 2: Convert to fraction form
438.41/657.63 = 178.53/x - Step 3: Cross multiply
438.41x = 657.63 × 178.53 - Step 4: Simplify right side
438.41x = 117,406.68 - Step 5: Solve for x
x = 117,406.68/438.41 - Step 6: Final answer
x = 267.80
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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.