Finding the Fourth Proportional to 389,647,279.80, 537,694,138.26 and 213,436,056.96
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Solution
The fourth proportional to 389,647,279.80, 537,694,138.26 and 213,436,056.96 is: 294,531,291.94
Step by Step Solution
- Step 1: Write the proportion equation
389,647,279.80 : 537,694,138.26 = 213,436,056.96 : x - Step 2: Convert to fraction form
389,647,279.80/537,694,138.26 = 213,436,056.96/x - Step 3: Cross multiply
389,647,279.80x = 537,694,138.26 × 213,436,056.96 - Step 4: Simplify right side
389,647,279.80x = 114,763,316,720,719,472 - Step 5: Solve for x
x = 114,763,316,720,719,472/389,647,279.80 - Step 6: Final answer
x = 294,531,291.94
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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.