Finding the Fourth Proportional to 515,403.67, 711,292.58 and 289,063.75
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Solution
The fourth proportional to 515,403.67, 711,292.58 and 289,063.75 is: 398,927.89
Step by Step Solution
- Step 1: Write the proportion equation
515,403.67 : 711,292.58 = 289,063.75 : x - Step 2: Convert to fraction form
515,403.67/711,292.58 = 289,063.75/x - Step 3: Cross multiply
515,403.67x = 711,292.58 × 289,063.75 - Step 4: Simplify right side
515,403.67x = 205,608,900,521.98 - Step 5: Solve for x
x = 205,608,900,521.98/515,403.67 - Step 6: Final answer
x = 398,927.89
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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.