Finding the Fourth Proportional to 391,412,805.20, 587,119,207.80 and 118,783,134.80
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Solution
The fourth proportional to 391,412,805.20, 587,119,207.80 and 118,783,134.80 is: 178,174,702.20
Step by Step Solution
- Step 1: Write the proportion equation
391,412,805.20 : 587,119,207.80 = 118,783,134.80 : x - Step 2: Convert to fraction form
391,412,805.20/587,119,207.80 = 118,783,134.80/x - Step 3: Cross multiply
391,412,805.20x = 587,119,207.80 × 118,783,134.80 - Step 4: Simplify right side
391,412,805.20x = 69,739,860,003,776,608 - Step 5: Solve for x
x = 69,739,860,003,776,608/391,412,805.20 - Step 6: Final answer
x = 178,174,702.20
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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.