Finding the Fourth Proportional to 1,288,638.29, 1,778,324.97 and 715,678.44
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Solution
The fourth proportional to 1,288,638.29, 1,778,324.97 and 715,678.44 is: 987,638.54
Step by Step Solution
- Step 1: Write the proportion equation
1,288,638.29 : 1,778,324.97 = 715,678.44 : x - Step 2: Convert to fraction form
1,288,638.29/1,778,324.97 = 715,678.44/x - Step 3: Cross multiply
1,288,638.29x = 1,778,324.97 × 715,678.44 - Step 4: Simplify right side
1,288,638.29x = 1,272,708,840,342.65 - Step 5: Solve for x
x = 1,272,708,840,342.65/1,288,638.29 - Step 6: Final answer
x = 987,638.54
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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.