Finding the Fourth Proportional to 312,591,519.08, 431,454,687.36 and 212,289,669.08
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Solution
The fourth proportional to 312,591,519.08, 431,454,687.36 and 212,289,669.08 is: 293,012,980.88
Step by Step Solution
- Step 1: Write the proportion equation
312,591,519.08 : 431,454,687.36 = 212,289,669.08 : x - Step 2: Convert to fraction form
312,591,519.08/431,454,687.36 = 212,289,669.08/x - Step 3: Cross multiply
312,591,519.08x = 431,454,687.36 × 212,289,669.08 - Step 4: Simplify right side
312,591,519.08x = 91,593,372,802,669,264 - Step 5: Solve for x
x = 91,593,372,802,669,264/312,591,519.08 - Step 6: Final answer
x = 293,012,980.88
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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.