Finding the Fourth Proportional to 312,430.09, 431,153.94 and 169,190.38
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Solution
The fourth proportional to 312,430.09, 431,153.94 and 169,190.38 is: 233,482.95
Step by Step Solution
- Step 1: Write the proportion equation
312,430.09 : 431,153.94 = 169,190.38 : x - Step 2: Convert to fraction form
312,430.09/431,153.94 = 169,190.38/x - Step 3: Cross multiply
312,430.09x = 431,153.94 × 169,190.38 - Step 4: Simplify right side
312,430.09x = 72,947,098,947.10 - Step 5: Solve for x
x = 72,947,098,947.10/312,430.09 - Step 6: Final answer
x = 233,482.95
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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.