Finding the Fourth Proportional to 505,772.10, 698,122.44 and 312,240.78
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Solution
The fourth proportional to 505,772.10, 698,122.44 and 312,240.78 is: 430,989.17
Step by Step Solution
- Step 1: Write the proportion equation
505,772.10 : 698,122.44 = 312,240.78 : x - Step 2: Convert to fraction form
505,772.10/698,122.44 = 312,240.78/x - Step 3: Cross multiply
505,772.10x = 698,122.44 × 312,240.78 - Step 4: Simplify right side
505,772.10x = 217,982,295,201.10 - Step 5: Solve for x
x = 217,982,295,201.10/505,772.10 - Step 6: Final answer
x = 430,989.17
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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.