Finding the Fourth Proportional to 438.18, 657.18 and 145.70
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Solution
The fourth proportional to 438.18, 657.18 and 145.70 is: 218.52
Step by Step Solution
- Step 1: Write the proportion equation
438.18 : 657.18 = 145.70 : x - Step 2: Convert to fraction form
438.18/657.18 = 145.70/x - Step 3: Cross multiply
438.18x = 657.18 × 145.70 - Step 4: Simplify right side
438.18x = 95,751.13 - Step 5: Solve for x
x = 95,751.13/438.18 - Step 6: Final answer
x = 218.52
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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.