Finding the Fourth Proportional to 768,402.72, 1,153,415.70 and 431,731.08
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Solution
The fourth proportional to 768,402.72, 1,153,415.70 and 431,731.08 is: 648,052.63
Step by Step Solution
- Step 1: Write the proportion equation
768,402.72 : 1,153,415.70 = 431,731.08 : x - Step 2: Convert to fraction form
768,402.72/1,153,415.70 = 431,731.08/x - Step 3: Cross multiply
768,402.72x = 1,153,415.70 × 431,731.08 - Step 4: Simplify right side
768,402.72x = 497,965,405,849.96 - Step 5: Solve for x
x = 497,965,405,849.96/768,402.72 - Step 6: Final answer
x = 648,052.63
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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.