Finding the Fourth Proportional to 311,979,187.68, 430,526,021.28 and 172,746,959.28
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Solution
The fourth proportional to 311,979,187.68, 430,526,021.28 and 172,746,959.28 is: 238,387,892.54
Step by Step Solution
- Step 1: Write the proportion equation
311,979,187.68 : 430,526,021.28 = 172,746,959.28 : x - Step 2: Convert to fraction form
311,979,187.68/430,526,021.28 = 172,746,959.28/x - Step 3: Cross multiply
311,979,187.68x = 430,526,021.28 × 172,746,959.28 - Step 4: Simplify right side
311,979,187.68x = 74,372,061,067,036,576 - Step 5: Solve for x
x = 74,372,061,067,036,576/311,979,187.68 - Step 6: Final answer
x = 238,387,892.54
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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.