Finding the Fourth Proportional to 312,372.54, 431,072.28 and 169,129.62
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Solution
The fourth proportional to 312,372.54, 431,072.28 and 169,129.62 is: 233,397.89
Step by Step Solution
- Step 1: Write the proportion equation
312,372.54 : 431,072.28 = 169,129.62 : x - Step 2: Convert to fraction form
312,372.54/431,072.28 = 169,129.62/x - Step 3: Cross multiply
312,372.54x = 431,072.28 × 169,129.62 - Step 4: Simplify right side
312,372.54x = 72,907,090,908.93 - Step 5: Solve for x
x = 72,907,090,908.93/312,372.54 - Step 6: Final answer
x = 233,397.89
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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.