Finding the Fourth Proportional to 391,170,106.20, 539,811,589.50 and 212,552,431.32
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Solution
The fourth proportional to 391,170,106.20, 539,811,589.50 and 212,552,431.32 is: 293,320,639.75
Step by Step Solution
- Step 1: Write the proportion equation
391,170,106.20 : 539,811,589.50 = 212,552,431.32 : x - Step 2: Convert to fraction form
391,170,106.20/539,811,589.50 = 212,552,431.32/x - Step 3: Cross multiply
391,170,106.20x = 539,811,589.50 × 212,552,431.32 - Step 4: Simplify right side
391,170,106.20x = 114,738,265,802,938,784 - Step 5: Solve for x
x = 114,738,265,802,938,784/391,170,106.20 - Step 6: Final answer
x = 293,320,639.75
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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.