Finding the Fourth Proportional to 328,011.21, 490,219.67 and 239,451.21
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Solution
The fourth proportional to 328,011.21, 490,219.67 and 239,451.21 is: 357,864.88
Step by Step Solution
- Step 1: Write the proportion equation
328,011.21 : 490,219.67 = 239,451.21 : x - Step 2: Convert to fraction form
328,011.21/490,219.67 = 239,451.21/x - Step 3: Cross multiply
328,011.21x = 490,219.67 × 239,451.21 - Step 4: Simplify right side
328,011.21x = 117,383,693,745.93 - Step 5: Solve for x
x = 117,383,693,745.93/328,011.21 - Step 6: Final answer
x = 357,864.88
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.