Finding the Fourth Proportional to 1,296,638.10, 1,789,344.45 and 715,865.94
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Solution
The fourth proportional to 1,296,638.10, 1,789,344.45 and 715,865.94 is: 987,886.09
Step by Step Solution
- Step 1: Write the proportion equation
1,296,638.10 : 1,789,344.45 = 715,865.94 : x - Step 2: Convert to fraction form
1,296,638.10/1,789,344.45 = 715,865.94/x - Step 3: Cross multiply
1,296,638.10x = 1,789,344.45 × 715,865.94 - Step 4: Simplify right side
1,296,638.10x = 1,280,930,746,683.03 - Step 5: Solve for x
x = 1,280,930,746,683.03/1,296,638.10 - Step 6: Final answer
x = 987,886.09
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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.