Finding the Fourth Proportional to 438,031.80, 657,047.70 and 272,143.80
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Solution
The fourth proportional to 438,031.80, 657,047.70 and 272,143.80 is: 408,215.70
Step by Step Solution
- Step 1: Write the proportion equation
438,031.80 : 657,047.70 = 272,143.80 : x - Step 2: Convert to fraction form
438,031.80/657,047.70 = 272,143.80/x - Step 3: Cross multiply
438,031.80x = 657,047.70 × 272,143.80 - Step 4: Simplify right side
438,031.80x = 178,811,457,859.26 - Step 5: Solve for x
x = 178,811,457,859.26/438,031.80 - Step 6: Final answer
x = 408,215.70
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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.