Finding the Fourth Proportional to 387,391.05, 580,753.74 and 134,638.71
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Solution
The fourth proportional to 387,391.05, 580,753.74 and 134,638.71 is: 201,842.39
Step by Step Solution
- Step 1: Write the proportion equation
387,391.05 : 580,753.74 = 134,638.71 : x - Step 2: Convert to fraction form
387,391.05/580,753.74 = 134,638.71/x - Step 3: Cross multiply
387,391.05x = 580,753.74 × 134,638.71 - Step 4: Simplify right side
387,391.05x = 78,191,934,381.28 - Step 5: Solve for x
x = 78,191,934,381.28/387,391.05 - Step 6: Final answer
x = 201,842.39
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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.