Finding the Fourth Proportional to 309,729,059.88, 427,516,362.36 and 202,453,965.60
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Solution
The fourth proportional to 309,729,059.88, 427,516,362.36 and 202,453,965.60 is: 279,445,470.67
Step by Step Solution
- Step 1: Write the proportion equation
309,729,059.88 : 427,516,362.36 = 202,453,965.60 : x - Step 2: Convert to fraction form
309,729,059.88/427,516,362.36 = 202,453,965.60/x - Step 3: Cross multiply
309,729,059.88x = 427,516,362.36 × 202,453,965.60 - Step 4: Simplify right side
309,729,059.88x = 86,552,382,918,668,576 - Step 5: Solve for x
x = 86,552,382,918,668,576/309,729,059.88 - Step 6: Final answer
x = 279,445,470.67
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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.