Finding the Fourth Proportional to 678,720.28, 936,529.68 and 392,184.76
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Solution
The fourth proportional to 678,720.28, 936,529.68 and 392,184.76 is: 541,154.70
Step by Step Solution
- Step 1: Write the proportion equation
678,720.28 : 936,529.68 = 392,184.76 : x - Step 2: Convert to fraction form
678,720.28/936,529.68 = 392,184.76/x - Step 3: Cross multiply
678,720.28x = 936,529.68 × 392,184.76 - Step 4: Simplify right side
678,720.28x = 367,292,667,783.68 - Step 5: Solve for x
x = 367,292,667,783.68/678,720.28 - Step 6: Final answer
x = 541,154.70
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1.5x scale
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.