Finding the Fourth Proportional to 387,959.09, 535,207.70 and 280,358.69
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Solution
The fourth proportional to 387,959.09, 535,207.70 and 280,358.69 is: 386,767.92
Step by Step Solution
- Step 1: Write the proportion equation
387,959.09 : 535,207.70 = 280,358.69 : x - Step 2: Convert to fraction form
387,959.09/535,207.70 = 280,358.69/x - Step 3: Cross multiply
387,959.09x = 535,207.70 × 280,358.69 - Step 4: Simplify right side
387,959.09x = 150,050,127,674.77 - Step 5: Solve for x
x = 150,050,127,674.77/387,959.09 - Step 6: Final answer
x = 386,767.92
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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.