Finding the Fourth Proportional to 438.14, 657.36 and 221.66
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Solution
The fourth proportional to 438.14, 657.36 and 221.66 is: 332.57
Step by Step Solution
- Step 1: Write the proportion equation
438.14 : 657.36 = 221.66 : x - Step 2: Convert to fraction form
438.14/657.36 = 221.66/x - Step 3: Cross multiply
438.14x = 657.36 × 221.66 - Step 4: Simplify right side
438.14x = 145,710.42 - Step 5: Solve for x
x = 145,710.42/438.14 - Step 6: Final answer
x = 332.57
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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.