Finding the Fourth Proportional to 438.09, 656.63 and 207.05
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Solution
The fourth proportional to 438.09, 656.63 and 207.05 is: 310.33
Step by Step Solution
- Step 1: Write the proportion equation
438.09 : 656.63 = 207.05 : x - Step 2: Convert to fraction form
438.09/656.63 = 207.05/x - Step 3: Cross multiply
438.09x = 656.63 × 207.05 - Step 4: Simplify right side
438.09x = 135,950.92 - Step 5: Solve for x
x = 135,950.92/438.09 - Step 6: Final answer
x = 310.33
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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.