Finding the Fourth Proportional to 636,385,919.68, 878,289,021.91 and 385,482,949.68
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Solution
The fourth proportional to 636,385,919.68, 878,289,021.91 and 385,482,949.68 is: 532,012,780.87
Step by Step Solution
- Step 1: Write the proportion equation
636,385,919.68 : 878,289,021.91 = 385,482,949.68 : x - Step 2: Convert to fraction form
636,385,919.68/878,289,021.91 = 385,482,949.68/x - Step 3: Cross multiply
636,385,919.68x = 878,289,021.91 × 385,482,949.68 - Step 4: Simplify right side
636,385,919.68x = 338,565,442,836,268,352 - Step 5: Solve for x
x = 338,565,442,836,268,352/636,385,919.68 - Step 6: Final answer
x = 532,012,780.87
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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.