Finding the Fourth Proportional to 643,647,034.05, 888,178,538.00 and 389,423,109.18
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Solution
The fourth proportional to 643,647,034.05, 888,178,538.00 and 389,423,109.18 is: 537,370,996.02
Step by Step Solution
- Step 1: Write the proportion equation
643,647,034.05 : 888,178,538.00 = 389,423,109.18 : x - Step 2: Convert to fraction form
643,647,034.05/888,178,538.00 = 389,423,109.18/x - Step 3: Cross multiply
643,647,034.05x = 888,178,538.00 × 389,423,109.18 - Step 4: Simplify right side
643,647,034.05x = 345,877,247,777,539,712 - Step 5: Solve for x
x = 345,877,247,777,539,712/643,647,034.05 - Step 6: Final answer
x = 537,370,996.02
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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.