Finding the Fourth Proportional to 385,336,841.12, 531,765,118.08 and 209,124,789.76
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Solution
The fourth proportional to 385,336,841.12, 531,765,118.08 and 209,124,789.76 is: 288,592,360.38
Step by Step Solution
- Step 1: Write the proportion equation
385,336,841.12 : 531,765,118.08 = 209,124,789.76 : x - Step 2: Convert to fraction form
385,336,841.12/531,765,118.08 = 209,124,789.76/x - Step 3: Cross multiply
385,336,841.12x = 531,765,118.08 × 209,124,789.76 - Step 4: Simplify right side
385,336,841.12x = 111,205,268,520,181,568 - Step 5: Solve for x
x = 111,205,268,520,181,568/385,336,841.12 - Step 6: Final answer
x = 288,592,360.38
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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.