Finding the Fourth Proportional to 438.26, 657.42 and 141.80
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Solution
The fourth proportional to 438.26, 657.42 and 141.80 is: 212.71
Step by Step Solution
- Step 1: Write the proportion equation
438.26 : 657.42 = 141.80 : x - Step 2: Convert to fraction form
438.26/657.42 = 141.80/x - Step 3: Cross multiply
438.26x = 657.42 × 141.80 - Step 4: Simplify right side
438.26x = 93,224.68 - Step 5: Solve for x
x = 93,224.68/438.26 - Step 6: Final answer
x = 212.71
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.