Finding the Fourth Proportional to 990,826,516.35, 1,486,239,774.53 and 408,260,892.15
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Solution
The fourth proportional to 990,826,516.35, 1,486,239,774.53 and 408,260,892.15 is: 612,391,338.23
Step by Step Solution
- Step 1: Write the proportion equation
990,826,516.35 : 1,486,239,774.53 = 408,260,892.15 : x - Step 2: Convert to fraction form
990,826,516.35/1,486,239,774.53 = 408,260,892.15/x - Step 3: Cross multiply
990,826,516.35x = 1,486,239,774.53 × 408,260,892.15 - Step 4: Simplify right side
990,826,516.35x = 606,773,576,296,391,296 - Step 5: Solve for x
x = 606,773,576,296,391,296/990,826,516.35 - Step 6: Final answer
x = 612,391,338.23
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Double scale
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Similar ratio
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.