Finding the Fourth Proportional to 489,905,998.80, 734,858,998.20 and 217,276,765.80
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Solution
The fourth proportional to 489,905,998.80, 734,858,998.20 and 217,276,765.80 is: 325,915,148.70
Step by Step Solution
- Step 1: Write the proportion equation
489,905,998.80 : 734,858,998.20 = 217,276,765.80 : x - Step 2: Convert to fraction form
489,905,998.80/734,858,998.20 = 217,276,765.80/x - Step 3: Cross multiply
489,905,998.80x = 734,858,998.20 × 217,276,765.80 - Step 4: Simplify right side
489,905,998.80x = 159,667,786,447,924,032 - Step 5: Solve for x
x = 159,667,786,447,924,032/489,905,998.80 - Step 6: Final answer
x = 325,915,148.70
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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.