Finding the Fourth Proportional to 312,471.81, 431,210.99 and 169,231.82
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Solution
The fourth proportional to 312,471.81, 431,210.99 and 169,231.82 is: 233,539.85
Step by Step Solution
- Step 1: Write the proportion equation
312,471.81 : 431,210.99 = 169,231.82 : x - Step 2: Convert to fraction form
312,471.81/431,210.99 = 169,231.82/x - Step 3: Cross multiply
312,471.81x = 431,210.99 × 169,231.82 - Step 4: Simplify right side
312,471.81x = 72,974,618,908.73 - Step 5: Solve for x
x = 72,974,618,908.73/312,471.81 - Step 6: Final answer
x = 233,539.85
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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.