Finding the Fourth Proportional to 1,272,742.20, 1,908,982.08 and 431,272.08
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Solution
The fourth proportional to 1,272,742.20, 1,908,982.08 and 431,272.08 is: 646,863.66
Step by Step Solution
- Step 1: Write the proportion equation
1,272,742.20 : 1,908,982.08 = 431,272.08 : x - Step 2: Convert to fraction form
1,272,742.20/1,908,982.08 = 431,272.08/x - Step 3: Cross multiply
1,272,742.20x = 1,908,982.08 × 431,272.08 - Step 4: Simplify right side
1,272,742.20x = 823,290,672,324.33 - Step 5: Solve for x
x = 823,290,672,324.33/1,272,742.20 - Step 6: Final answer
x = 646,863.66
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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.