Finding the Fourth Proportional to 391,170,104.20, 539,811,586.74 and 212,552,429.32
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Solution
The fourth proportional to 391,170,104.20, 539,811,586.74 and 212,552,429.32 is: 293,320,636.99
Step by Step Solution
- Step 1: Write the proportion equation
391,170,104.20 : 539,811,586.74 = 212,552,429.32 : x - Step 2: Convert to fraction form
391,170,104.20/539,811,586.74 = 212,552,429.32/x - Step 3: Cross multiply
391,170,104.20x = 539,811,586.74 × 212,552,429.32 - Step 4: Simplify right side
391,170,104.20x = 114,738,264,136,670,896 - Step 5: Solve for x
x = 114,738,264,136,670,896/391,170,104.20 - Step 6: Final answer
x = 293,320,636.99
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.