Finding the Fourth Proportional to 711,342.09, 981,639.68 and 389,045.12
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Solution
The fourth proportional to 711,342.09, 981,639.68 and 389,045.12 is: 536,875.47
Step by Step Solution
- Step 1: Write the proportion equation
711,342.09 : 981,639.68 = 389,045.12 : x - Step 2: Convert to fraction form
711,342.09/981,639.68 = 389,045.12/x - Step 3: Cross multiply
711,342.09x = 981,639.68 × 389,045.12 - Step 4: Simplify right side
711,342.09x = 381,902,120,248.94 - Step 5: Solve for x
x = 381,902,120,248.94/711,342.09 - Step 6: Final answer
x = 536,875.47
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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.