Finding the Fourth Proportional to 512,486.10, 768,729.15 and 487,991.70
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Solution
The fourth proportional to 512,486.10, 768,729.15 and 487,991.70 is: 731,987.55
Step by Step Solution
- Step 1: Write the proportion equation
512,486.10 : 768,729.15 = 487,991.70 : x - Step 2: Convert to fraction form
512,486.10/768,729.15 = 487,991.70/x - Step 3: Cross multiply
512,486.10x = 768,729.15 × 487,991.70 - Step 4: Simplify right side
512,486.10x = 375,133,444,748.06 - Step 5: Solve for x
x = 375,133,444,748.06/512,486.10 - Step 6: Final answer
x = 731,987.55
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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.