Finding the Fourth Proportional to 1,387,701.35, 2,081,747.69 and 428,235.05
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Solution
The fourth proportional to 1,387,701.35, 2,081,747.69 and 428,235.05 is: 642,412.96
Step by Step Solution
- Step 1: Write the proportion equation
1,387,701.35 : 2,081,747.69 = 428,235.05 : x - Step 2: Convert to fraction form
1,387,701.35/2,081,747.69 = 428,235.05/x - Step 3: Cross multiply
1,387,701.35x = 2,081,747.69 × 428,235.05 - Step 4: Simplify right side
1,387,701.35x = 891,477,330,783.61 - Step 5: Solve for x
x = 891,477,330,783.61/1,387,701.35 - Step 6: Final answer
x = 642,412.96
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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.