Finding the Fourth Proportional to 438.91, 657.97 and 207.65
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Solution
The fourth proportional to 438.91, 657.97 and 207.65 is: 311.29
Step by Step Solution
- Step 1: Write the proportion equation
438.91 : 657.97 = 207.65 : x - Step 2: Convert to fraction form
438.91/657.97 = 207.65/x - Step 3: Cross multiply
438.91x = 657.97 × 207.65 - Step 4: Simplify right side
438.91x = 136,628.60 - Step 5: Solve for x
x = 136,628.60/438.91 - Step 6: Final answer
x = 311.29
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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.