Finding the Fourth Proportional to 317,458.30, 438,112.12 and 209,841.70
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Solution
The fourth proportional to 317,458.30, 438,112.12 and 209,841.70 is: 289,594.55
Step by Step Solution
- Step 1: Write the proportion equation
317,458.30 : 438,112.12 = 209,841.70 : x - Step 2: Convert to fraction form
317,458.30/438,112.12 = 209,841.70/x - Step 3: Cross multiply
317,458.30x = 438,112.12 × 209,841.70 - Step 4: Simplify right side
317,458.30x = 91,934,192,051.40 - Step 5: Solve for x
x = 91,934,192,051.40/317,458.30 - Step 6: Final answer
x = 289,594.55
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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.