Finding the Fourth Proportional to 391,136.88, 539,769.24 and 212,288.88
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Solution
The fourth proportional to 391,136.88, 539,769.24 and 212,288.88 is: 292,958.84
Step by Step Solution
- Step 1: Write the proportion equation
391,136.88 : 539,769.24 = 212,288.88 : x - Step 2: Convert to fraction form
391,136.88/539,769.24 = 212,288.88/x - Step 3: Cross multiply
391,136.88x = 539,769.24 × 212,288.88 - Step 4: Simplify right side
391,136.88x = 114,587,007,418.05 - Step 5: Solve for x
x = 114,587,007,418.05/391,136.88 - Step 6: Final answer
x = 292,958.84
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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.