Finding the Fourth Proportional to 312,018,749.44, 430,599,409.36 and 172,789,511.21
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Solution
The fourth proportional to 312,018,749.44, 430,599,409.36 and 172,789,511.21 is: 238,457,020.94
Step by Step Solution
- Step 1: Write the proportion equation
312,018,749.44 : 430,599,409.36 = 172,789,511.21 : x - Step 2: Convert to fraction form
312,018,749.44/430,599,409.36 = 172,789,511.21/x - Step 3: Cross multiply
312,018,749.44x = 430,599,409.36 × 172,789,511.21 - Step 4: Simplify right side
312,018,749.44x = 74,403,061,469,655,424 - Step 5: Solve for x
x = 74,403,061,469,655,424/312,018,749.44 - Step 6: Final answer
x = 238,457,020.94
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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.