Finding the Fourth Proportional to 678,864.66, 936,729.09 and 392,329.41
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Solution
The fourth proportional to 678,864.66, 936,729.09 and 392,329.41 is: 541,354.40
Step by Step Solution
- Step 1: Write the proportion equation
678,864.66 : 936,729.09 = 392,329.41 : x - Step 2: Convert to fraction form
678,864.66/936,729.09 = 392,329.41/x - Step 3: Cross multiply
678,864.66x = 936,729.09 × 392,329.41 - Step 4: Simplify right side
678,864.66x = 367,506,371,209.54 - Step 5: Solve for x
x = 367,506,371,209.54/678,864.66 - Step 6: Final answer
x = 541,354.40
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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.