Finding the Fourth Proportional to 678,847.96, 936,706.14 and 392,312.75
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Solution
The fourth proportional to 678,847.96, 936,706.14 and 392,312.75 is: 541,331.47
Step by Step Solution
- Step 1: Write the proportion equation
678,847.96 : 936,706.14 = 392,312.75 : x - Step 2: Convert to fraction form
678,847.96/936,706.14 = 392,312.75/x - Step 3: Cross multiply
678,847.96x = 936,706.14 × 392,312.75 - Step 4: Simplify right side
678,847.96x = 367,481,761,725.29 - Step 5: Solve for x
x = 367,481,761,725.29/678,847.96 - Step 6: Final answer
x = 541,331.47
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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.