Finding the Fourth Proportional to 1,207,416,983.74, 1,810,915,350.80 and 389,529,285.82
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Solution
The fourth proportional to 1,207,416,983.74, 1,810,915,350.80 and 389,529,285.82 is: 584,226,139.58
Step by Step Solution
- Step 1: Write the proportion equation
1,207,416,983.74 : 1,810,915,350.80 = 389,529,285.82 : x - Step 2: Convert to fraction form
1,207,416,983.74/1,810,915,350.80 = 389,529,285.82/x - Step 3: Cross multiply
1,207,416,983.74x = 1,810,915,350.80 × 389,529,285.82 - Step 4: Simplify right side
1,207,416,983.74x = 705,404,563,277,598,720 - Step 5: Solve for x
x = 705,404,563,277,598,720/1,207,416,983.74 - Step 6: Final answer
x = 584,226,139.58
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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.