Finding the Fourth Proportional to 1,516,777,139.21, 2,275,165,708.81 and 426,260,207.21
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Solution
The fourth proportional to 1,516,777,139.21, 2,275,165,708.81 and 426,260,207.21 is: 639,390,310.81
Step by Step Solution
- Step 1: Write the proportion equation
1,516,777,139.21 : 2,275,165,708.81 = 426,260,207.21 : x - Step 2: Convert to fraction form
1,516,777,139.21/2,275,165,708.81 = 426,260,207.21/x - Step 3: Cross multiply
1,516,777,139.21x = 2,275,165,708.81 × 426,260,207.21 - Step 4: Simplify right side
1,516,777,139.21x = 969,812,606,474,436,992 - Step 5: Solve for x
x = 969,812,606,474,436,992/1,516,777,139.21 - Step 6: Final answer
x = 639,390,310.81
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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.