Finding the Fourth Proportional to 279,138.57, 385,213.05 and 151,815.09
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Solution
The fourth proportional to 279,138.57, 385,213.05 and 151,815.09 is: 209,505.82
Step by Step Solution
- Step 1: Write the proportion equation
279,138.57 : 385,213.05 = 151,815.09 : x - Step 2: Convert to fraction form
279,138.57/385,213.05 = 151,815.09/x - Step 3: Cross multiply
279,138.57x = 385,213.05 × 151,815.09 - Step 4: Simplify right side
279,138.57x = 58,481,153,854.92 - Step 5: Solve for x
x = 58,481,153,854.92/279,138.57 - Step 6: Final answer
x = 209,505.82
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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.