Finding the Fourth Proportional to 639,013,900,640.20, 881,866,902,846.05 and 353,872,420,736.17
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Solution
The fourth proportional to 639,013,900,640.20, 881,866,902,846.05 and 353,872,420,736.17 is: 488,359,291,346.55
Step by Step Solution
- Step 1: Write the proportion equation
639,013,900,640.20 : 881,866,902,846.05 = 353,872,420,736.17 : x - Step 2: Convert to fraction form
639,013,900,640.20/881,866,902,846.05 = 353,872,420,736.17/x - Step 3: Cross multiply
639,013,900,640.20x = 881,866,902,846.05 × 353,872,420,736.17 - Step 4: Simplify right side
639,013,900,640.20x = 312,068,375,677,240,571,068,416 - Step 5: Solve for x
x = 312,068,375,677,240,571,068,416/639,013,900,640.20 - Step 6: Final answer
x = 488,359,291,346.55
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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.