Finding the Fourth Proportional to 2,985,986,512.20, 4,478,979,768.30 and 915,691,830.60
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Solution
The fourth proportional to 2,985,986,512.20, 4,478,979,768.30 and 915,691,830.60 is: 1,373,537,745.90
Step by Step Solution
- Step 1: Write the proportion equation
2,985,986,512.20 : 4,478,979,768.30 = 915,691,830.60 : x - Step 2: Convert to fraction form
2,985,986,512.20/4,478,979,768.30 = 915,691,830.60/x - Step 3: Cross multiply
2,985,986,512.20x = 4,478,979,768.30 × 915,691,830.60 - Step 4: Simplify right side
2,985,986,512.20x = 4,101,365,183,254,991,360 - Step 5: Solve for x
x = 4,101,365,183,254,991,360/2,985,986,512.20 - Step 6: Final answer
x = 1,373,537,745.90
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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.