Finding the Fourth Proportional to 328,431.40, 492,776.70 and 128,717.80
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Solution
The fourth proportional to 328,431.40, 492,776.70 and 128,717.80 is: 193,127.49
Step by Step Solution
- Step 1: Write the proportion equation
328,431.40 : 492,776.70 = 128,717.80 : x - Step 2: Convert to fraction form
328,431.40/492,776.70 = 128,717.80/x - Step 3: Cross multiply
328,431.40x = 492,776.70 × 128,717.80 - Step 4: Simplify right side
328,431.40x = 63,429,132,715.26 - Step 5: Solve for x
x = 63,429,132,715.26/328,431.40 - Step 6: Final answer
x = 193,127.49
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1.5x scale
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.