Finding the Fourth Proportional to 291,711.13, 437,640.49 and 81,349.09
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Solution
The fourth proportional to 291,711.13, 437,640.49 and 81,349.09 is: 122,044.21
Step by Step Solution
- Step 1: Write the proportion equation
291,711.13 : 437,640.49 = 81,349.09 : x - Step 2: Convert to fraction form
291,711.13/437,640.49 = 81,349.09/x - Step 3: Cross multiply
291,711.13x = 437,640.49 × 81,349.09 - Step 4: Simplify right side
291,711.13x = 35,601,653,420.45 - Step 5: Solve for x
x = 35,601,653,420.45/291,711.13 - Step 6: Final answer
x = 122,044.21
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.