Finding the Fourth Proportional to 812,415.38, 1,121,042.66 and 449,748.41
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Solution
The fourth proportional to 812,415.38, 1,121,042.66 and 449,748.41 is: 620,602.66
Step by Step Solution
- Step 1: Write the proportion equation
812,415.38 : 1,121,042.66 = 449,748.41 : x - Step 2: Convert to fraction form
812,415.38/1,121,042.66 = 449,748.41/x - Step 3: Cross multiply
812,415.38x = 1,121,042.66 × 449,748.41 - Step 4: Simplify right side
812,415.38x = 504,187,146,023.22 - Step 5: Solve for x
x = 504,187,146,023.22/812,415.38 - Step 6: Final answer
x = 620,602.66
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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.