Finding the Fourth Proportional to 378,979.27, 522,988.18 and 209,209.75
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Solution
The fourth proportional to 378,979.27, 522,988.18 and 209,209.75 is: 288,707.68
Step by Step Solution
- Step 1: Write the proportion equation
378,979.27 : 522,988.18 = 209,209.75 : x - Step 2: Convert to fraction form
378,979.27/522,988.18 = 209,209.75/x - Step 3: Cross multiply
378,979.27x = 522,988.18 × 209,209.75 - Step 4: Simplify right side
378,979.27x = 109,414,226,390.76 - Step 5: Solve for x
x = 109,414,226,390.76/378,979.27 - Step 6: Final answer
x = 288,707.68
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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.