Finding the Fourth Proportional to 1,120,438,231.20, 1,680,951,279.60 and 430,367,997.60
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Solution
The fourth proportional to 1,120,438,231.20, 1,680,951,279.60 and 430,367,997.60 is: 645,664,898.00
Step by Step Solution
- Step 1: Write the proportion equation
1,120,438,231.20 : 1,680,951,279.60 = 430,367,997.60 : x - Step 2: Convert to fraction form
1,120,438,231.20/1,680,951,279.60 = 430,367,997.60/x - Step 3: Cross multiply
1,120,438,231.20x = 1,680,951,279.60 × 430,367,997.60 - Step 4: Simplify right side
1,120,438,231.20x = 723,427,636,264,609,664 - Step 5: Solve for x
x = 723,427,636,264,609,664/1,120,438,231.20 - Step 6: Final answer
x = 645,664,898.00
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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.