Finding the Fourth Proportional to 2,665,638,071.70, 3,998,457,107.55 and 1,288,142,999.70
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Solution
The fourth proportional to 2,665,638,071.70, 3,998,457,107.55 and 1,288,142,999.70 is: 1,932,214,499.55
Step by Step Solution
- Step 1: Write the proportion equation
2,665,638,071.70 : 3,998,457,107.55 = 1,288,142,999.70 : x - Step 2: Convert to fraction form
2,665,638,071.70/3,998,457,107.55 = 1,288,142,999.70/x - Step 3: Cross multiply
2,665,638,071.70x = 3,998,457,107.55 × 1,288,142,999.70 - Step 4: Simplify right side
2,665,638,071.70x = 5,150,584,532,691,243,008 - Step 5: Solve for x
x = 5,150,584,532,691,243,008/2,665,638,071.70 - Step 6: Final answer
x = 1,932,214,499.55
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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.