Finding the Fourth Proportional to 317,455.79, 438,108.68 and 209,839.19
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Solution
The fourth proportional to 317,455.79, 438,108.68 and 209,839.19 is: 289,591.09
Step by Step Solution
- Step 1: Write the proportion equation
317,455.79 : 438,108.68 = 209,839.19 : x - Step 2: Convert to fraction form
317,455.79/438,108.68 = 209,839.19/x - Step 3: Cross multiply
317,455.79x = 438,108.68 × 209,839.19 - Step 4: Simplify right side
317,455.79x = 91,932,369,493.97 - Step 5: Solve for x
x = 91,932,369,493.97/317,455.79 - Step 6: Final answer
x = 289,591.09
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1.5x scale
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.