Finding the Fourth Proportional to 669.63, 1,003.23 and 438.99
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Solution
The fourth proportional to 669.63, 1,003.23 and 438.99 is: 657.69
Step by Step Solution
- Step 1: Write the proportion equation
669.63 : 1,003.23 = 438.99 : x - Step 2: Convert to fraction form
669.63/1,003.23 = 438.99/x - Step 3: Cross multiply
669.63x = 1,003.23 × 438.99 - Step 4: Simplify right side
669.63x = 440,407.94 - Step 5: Solve for x
x = 440,407.94/669.63 - Step 6: Final answer
x = 657.69
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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.