Finding the Fourth Proportional to 348,972,129.60, 523,010,296.80 and 212,512,660.80
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Solution
The fourth proportional to 348,972,129.60, 523,010,296.80 and 212,512,660.80 is: 318,496,236.15
Step by Step Solution
- Step 1: Write the proportion equation
348,972,129.60 : 523,010,296.80 = 212,512,660.80 : x - Step 2: Convert to fraction form
348,972,129.60/523,010,296.80 = 212,512,660.80/x - Step 3: Cross multiply
348,972,129.60x = 523,010,296.80 × 212,512,660.80 - Step 4: Simplify right side
348,972,129.60x = 111,146,309,798,765,728 - Step 5: Solve for x
x = 111,146,309,798,765,728/348,972,129.60 - Step 6: Final answer
x = 318,496,236.15
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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.