Finding the Fourth Proportional to 515,640.78, 711,569.84 and 283,067.68
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Solution
The fourth proportional to 515,640.78, 711,569.84 and 283,067.68 is: 390,625.47
Step by Step Solution
- Step 1: Write the proportion equation
515,640.78 : 711,569.84 = 283,067.68 : x - Step 2: Convert to fraction form
515,640.78/711,569.84 = 283,067.68/x - Step 3: Cross multiply
515,640.78x = 711,569.84 × 283,067.68 - Step 4: Simplify right side
515,640.78x = 201,422,421,906.70 - Step 5: Solve for x
x = 201,422,421,906.70/515,640.78 - Step 6: Final answer
x = 390,625.47
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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.