Finding the Fourth Proportional to 328,471.80, 492,707.70 and 128,725.80
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Solution
The fourth proportional to 328,471.80, 492,707.70 and 128,725.80 is: 193,088.70
Step by Step Solution
- Step 1: Write the proportion equation
328,471.80 : 492,707.70 = 128,725.80 : x - Step 2: Convert to fraction form
328,471.80/492,707.70 = 128,725.80/x - Step 3: Cross multiply
328,471.80x = 492,707.70 × 128,725.80 - Step 4: Simplify right side
328,471.80x = 63,424,192,848.66 - Step 5: Solve for x
x = 63,424,192,848.66/328,471.80 - Step 6: Final answer
x = 193,088.70
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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.