Finding the Fourth Proportional to 1,387,928.16, 2,081,906.64 and 489,202.44
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Solution
The fourth proportional to 1,387,928.16, 2,081,906.64 and 489,202.44 is: 733,808.74
Step by Step Solution
- Step 1: Write the proportion equation
1,387,928.16 : 2,081,906.64 = 489,202.44 : x - Step 2: Convert to fraction form
1,387,928.16/2,081,906.64 = 489,202.44/x - Step 3: Cross multiply
1,387,928.16x = 2,081,906.64 × 489,202.44 - Step 4: Simplify right side
1,387,928.16x = 1,018,473,808,140.20 - Step 5: Solve for x
x = 1,018,473,808,140.20/1,387,928.16 - Step 6: Final answer
x = 733,808.74
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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.