Finding the Fourth Proportional to 1,318,595,906.10, 1,977,893,859.15 and 398,614,235.70
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Solution
The fourth proportional to 1,318,595,906.10, 1,977,893,859.15 and 398,614,235.70 is: 597,921,353.55
Step by Step Solution
- Step 1: Write the proportion equation
1,318,595,906.10 : 1,977,893,859.15 = 398,614,235.70 : x - Step 2: Convert to fraction form
1,318,595,906.10/1,977,893,859.15 = 398,614,235.70/x - Step 3: Cross multiply
1,318,595,906.10x = 1,977,893,859.15 × 398,614,235.70 - Step 4: Simplify right side
1,318,595,906.10x = 788,416,648,960,800,768 - Step 5: Solve for x
x = 788,416,648,960,800,768/1,318,595,906.10 - Step 6: Final answer
x = 597,921,353.55
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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.