Finding the Fourth Proportional to 1,079,528.94, 1,489,211.87 and 643,638.87
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Solution
The fourth proportional to 1,079,528.94, 1,489,211.87 and 643,638.87 is: 887,900.83
Step by Step Solution
- Step 1: Write the proportion equation
1,079,528.94 : 1,489,211.87 = 643,638.87 : x - Step 2: Convert to fraction form
1,079,528.94/1,489,211.87 = 643,638.87/x - Step 3: Cross multiply
1,079,528.94x = 1,489,211.87 × 643,638.87 - Step 4: Simplify right side
1,079,528.94x = 958,514,641,979.19 - Step 5: Solve for x
x = 958,514,641,979.19/1,079,528.94 - Step 6: Final answer
x = 887,900.83
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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.