Finding the Fourth Proportional to 515,863.36, 711,960.96 and 289,521.28
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Solution
The fourth proportional to 515,863.36, 711,960.96 and 289,521.28 is: 399,578.39
Step by Step Solution
- Step 1: Write the proportion equation
515,863.36 : 711,960.96 = 289,521.28 : x - Step 2: Convert to fraction form
515,863.36/711,960.96 = 289,521.28/x - Step 3: Cross multiply
515,863.36x = 711,960.96 × 289,521.28 - Step 4: Simplify right side
515,863.36x = 206,127,848,449.23 - Step 5: Solve for x
x = 206,127,848,449.23/515,863.36 - Step 6: Final answer
x = 399,578.39
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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.