Finding the Fourth Proportional to 515,708.99, 711,690.68 and 289,371.23
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Solution
The fourth proportional to 515,708.99, 711,690.68 and 289,371.23 is: 399,339.18
Step by Step Solution
- Step 1: Write the proportion equation
515,708.99 : 711,690.68 = 289,371.23 : x - Step 2: Convert to fraction form
515,708.99/711,690.68 = 289,371.23/x - Step 3: Cross multiply
515,708.99x = 711,690.68 × 289,371.23 - Step 4: Simplify right side
515,708.99x = 205,942,807,451.14 - Step 5: Solve for x
x = 205,942,807,451.14/515,708.99 - Step 6: Final answer
x = 399,339.18
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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.