Finding the Fourth Proportional to 2,120,645,679.12, 3,179,490,518.16 and 939,584,190.96
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Solution
The fourth proportional to 2,120,645,679.12, 3,179,490,518.16 and 939,584,190.96 is: 1,408,721,435.92
Step by Step Solution
- Step 1: Write the proportion equation
2,120,645,679.12 : 3,179,490,518.16 = 939,584,190.96 : x - Step 2: Convert to fraction form
2,120,645,679.12/3,179,490,518.16 = 939,584,190.96/x - Step 3: Cross multiply
2,120,645,679.12x = 3,179,490,518.16 × 939,584,190.96 - Step 4: Simplify right side
2,120,645,679.12x = 2,987,399,026,170,354,688 - Step 5: Solve for x
x = 2,987,399,026,170,354,688/2,120,645,679.12 - Step 6: Final answer
x = 1,408,721,435.92
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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.