Finding the Fourth Proportional to 2,988,142,753.20, 4,482,214,129.80 and 917,861,193.60
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Solution
The fourth proportional to 2,988,142,753.20, 4,482,214,129.80 and 917,861,193.60 is: 1,376,791,790.40
Step by Step Solution
- Step 1: Write the proportion equation
2,988,142,753.20 : 4,482,214,129.80 = 917,861,193.60 : x - Step 2: Convert to fraction form
2,988,142,753.20/4,482,214,129.80 = 917,861,193.60/x - Step 3: Cross multiply
2,988,142,753.20x = 4,482,214,129.80 × 917,861,193.60 - Step 4: Simplify right side
2,988,142,753.20x = 4,114,050,411,149,013,504 - Step 5: Solve for x
x = 4,114,050,411,149,013,504/2,988,142,753.20 - Step 6: Final answer
x = 1,376,791,790.40
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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.