Finding the Fourth Proportional to 312,785.12, 431,631.90 and 169,542.09
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Solution
The fourth proportional to 312,785.12, 431,631.90 and 169,542.09 is: 233,961.82
Step by Step Solution
- Step 1: Write the proportion equation
312,785.12 : 431,631.90 = 169,542.09 : x - Step 2: Convert to fraction form
312,785.12/431,631.90 = 169,542.09/x - Step 3: Cross multiply
312,785.12x = 431,631.90 × 169,542.09 - Step 4: Simplify right side
312,785.12x = 73,179,774,436.67 - Step 5: Solve for x
x = 73,179,774,436.67/312,785.12 - Step 6: Final answer
x = 233,961.82
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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.