Finding the Fourth Proportional to 318,586.74, 438,701.97 and 311,515.44
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Solution
The fourth proportional to 318,586.74, 438,701.97 and 311,515.44 is: 428,964.61
Step by Step Solution
- Step 1: Write the proportion equation
318,586.74 : 438,701.97 = 311,515.44 : x - Step 2: Convert to fraction form
318,586.74/438,701.97 = 311,515.44/x - Step 3: Cross multiply
318,586.74x = 438,701.97 × 311,515.44 - Step 4: Simplify right side
318,586.74x = 136,662,437,213.42 - Step 5: Solve for x
x = 136,662,437,213.42/318,586.74 - Step 6: Final answer
x = 428,964.61
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.