Finding the Fourth Proportional to 665,723.20, 918,703.56 and 379,238.80
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Solution
The fourth proportional to 665,723.20, 918,703.56 and 379,238.80 is: 523,352.70
Step by Step Solution
- Step 1: Write the proportion equation
665,723.20 : 918,703.56 = 379,238.80 : x - Step 2: Convert to fraction form
665,723.20/918,703.56 = 379,238.80/x - Step 3: Cross multiply
665,723.20x = 918,703.56 × 379,238.80 - Step 4: Simplify right side
665,723.20x = 348,408,035,650.13 - Step 5: Solve for x
x = 348,408,035,650.13/665,723.20 - Step 6: Final answer
x = 523,352.70
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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.