Finding the Fourth Proportional to 397,128.90, 548,042.08 and 215,840.88
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Solution
The fourth proportional to 397,128.90, 548,042.08 and 215,840.88 is: 297,862.70
Step by Step Solution
- Step 1: Write the proportion equation
397,128.90 : 548,042.08 = 215,840.88 : x - Step 2: Convert to fraction form
397,128.90/548,042.08 = 215,840.88/x - Step 3: Cross multiply
397,128.90x = 548,042.08 × 215,840.88 - Step 4: Simplify right side
397,128.90x = 118,289,884,824.23 - Step 5: Solve for x
x = 118,289,884,824.23/397,128.90 - Step 6: Final answer
x = 297,862.70
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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.