Finding the Fourth Proportional to 278,478.71, 384,234.72 and 157,619.97
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Solution
The fourth proportional to 278,478.71, 384,234.72 and 157,619.97 is: 217,478.26
Step by Step Solution
- Step 1: Write the proportion equation
278,478.71 : 384,234.72 = 157,619.97 : x - Step 2: Convert to fraction form
278,478.71/384,234.72 = 157,619.97/x - Step 3: Cross multiply
278,478.71x = 384,234.72 × 157,619.97 - Step 4: Simplify right side
278,478.71x = 60,563,065,039.36 - Step 5: Solve for x
x = 60,563,065,039.36/278,478.71 - Step 6: Final answer
x = 217,478.26
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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.