Finding the Fourth Proportional to 399,138.80, 598,708.20 and 379,455.80
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Solution
The fourth proportional to 399,138.80, 598,708.20 and 379,455.80 is: 569,183.70
Step by Step Solution
- Step 1: Write the proportion equation
399,138.80 : 598,708.20 = 379,455.80 : x - Step 2: Convert to fraction form
399,138.80/598,708.20 = 379,455.80/x - Step 3: Cross multiply
399,138.80x = 598,708.20 × 379,455.80 - Step 4: Simplify right side
399,138.80x = 227,183,298,997.56 - Step 5: Solve for x
x = 227,183,298,997.56/399,138.80 - Step 6: Final answer
x = 569,183.70
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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.