Finding the Fourth Proportional to 378,128.44, 521,828.18 and 208,373.50
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Solution
The fourth proportional to 378,128.44, 521,828.18 and 208,373.50 is: 287,561.45
Step by Step Solution
- Step 1: Write the proportion equation
378,128.44 : 521,828.18 = 208,373.50 : x - Step 2: Convert to fraction form
378,128.44/521,828.18 = 208,373.50/x - Step 3: Cross multiply
378,128.44x = 521,828.18 × 208,373.50 - Step 4: Simplify right side
378,128.44x = 108,735,163,481.59 - Step 5: Solve for x
x = 108,735,163,481.59/378,128.44 - Step 6: Final answer
x = 287,561.45
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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.