Finding the Fourth Proportional to 438.06, 657.09 and 221.79
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Solution
The fourth proportional to 438.06, 657.09 and 221.79 is: 332.68
Step by Step Solution
- Step 1: Write the proportion equation
438.06 : 657.09 = 221.79 : x - Step 2: Convert to fraction form
438.06/657.09 = 221.79/x - Step 3: Cross multiply
438.06x = 657.09 × 221.79 - Step 4: Simplify right side
438.06x = 145,734.14 - Step 5: Solve for x
x = 145,734.14/438.06 - Step 6: Final answer
x = 332.68
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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.