Finding the Fourth Proportional to 312,721.91, 431,556.99 and 169,481.92
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Solution
The fourth proportional to 312,721.91, 431,556.99 and 169,481.92 is: 233,885.45
Step by Step Solution
- Step 1: Write the proportion equation
312,721.91 : 431,556.99 = 169,481.92 : x - Step 2: Convert to fraction form
312,721.91/431,556.99 = 169,481.92/x - Step 3: Cross multiply
312,721.91x = 431,556.99 × 169,481.92 - Step 4: Simplify right side
312,721.91x = 73,141,106,826.01 - Step 5: Solve for x
x = 73,141,106,826.01/312,721.91 - Step 6: Final answer
x = 233,885.45
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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.