Finding the Fourth Proportional to 378,011.06, 521,655.12 and 208,245.19
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Solution
The fourth proportional to 378,011.06, 521,655.12 and 208,245.19 is: 287,378.28
Step by Step Solution
- Step 1: Write the proportion equation
378,011.06 : 521,655.12 = 208,245.19 : x - Step 2: Convert to fraction form
378,011.06/521,655.12 = 208,245.19/x - Step 3: Cross multiply
378,011.06x = 521,655.12 × 208,245.19 - Step 4: Simplify right side
378,011.06x = 108,632,168,471.92 - Step 5: Solve for x
x = 108,632,168,471.92/378,011.06 - Step 6: Final answer
x = 287,378.28
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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.