Finding the Fourth Proportional to 505,420,636.88, 697,437,190.68 and 290,846,232.56
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Solution
The fourth proportional to 505,420,636.88, 697,437,190.68 and 290,846,232.56 is: 401,342,890.56
Step by Step Solution
- Step 1: Write the proportion equation
505,420,636.88 : 697,437,190.68 = 290,846,232.56 : x - Step 2: Convert to fraction form
505,420,636.88/697,437,190.68 = 290,846,232.56/x - Step 3: Cross multiply
505,420,636.88x = 697,437,190.68 × 290,846,232.56 - Step 4: Simplify right side
505,420,636.88x = 202,846,979,356,508,320 - Step 5: Solve for x
x = 202,846,979,356,508,320/505,420,636.88 - Step 6: Final answer
x = 401,342,890.56
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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.