Finding the Fourth Proportional to 387,478.92, 580,135.68 and 209,347.68
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Solution
The fourth proportional to 387,478.92, 580,135.68 and 209,347.68 is: 313,436.56
Step by Step Solution
- Step 1: Write the proportion equation
387,478.92 : 580,135.68 = 209,347.68 : x - Step 2: Convert to fraction form
387,478.92/580,135.68 = 209,347.68/x - Step 3: Cross multiply
387,478.92x = 580,135.68 × 209,347.68 - Step 4: Simplify right side
387,478.92x = 121,450,058,693.22 - Step 5: Solve for x
x = 121,450,058,693.22/387,478.92 - Step 6: Final answer
x = 313,436.56
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.