Finding the Fourth Proportional to 381,173.85, 571,615.52 and 128,386.49
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Solution
The fourth proportional to 381,173.85, 571,615.52 and 128,386.49 is: 192,530.80
Step by Step Solution
- Step 1: Write the proportion equation
381,173.85 : 571,615.52 = 128,386.49 : x - Step 2: Convert to fraction form
381,173.85/571,615.52 = 128,386.49/x - Step 3: Cross multiply
381,173.85x = 571,615.52 × 128,386.49 - Step 4: Simplify right side
381,173.85x = 73,387,706,742.31 - Step 5: Solve for x
x = 73,387,706,742.31/381,173.85 - Step 6: Final answer
x = 192,530.80
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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.