Finding the Fourth Proportional to 438.19, 657.30 and 207.09
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Solution
The fourth proportional to 438.19, 657.30 and 207.09 is: 310.64
Step by Step Solution
- Step 1: Write the proportion equation
438.19 : 657.30 = 207.09 : x - Step 2: Convert to fraction form
438.19/657.30 = 207.09/x - Step 3: Cross multiply
438.19x = 657.30 × 207.09 - Step 4: Simplify right side
438.19x = 136,120.26 - Step 5: Solve for x
x = 136,120.26/438.19 - Step 6: Final answer
x = 310.64
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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.