Finding the Fourth Proportional to 678,354.12, 936,226.08 and 406,432.80
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Solution
The fourth proportional to 678,354.12, 936,226.08 and 406,432.80 is: 560,935.62
Step by Step Solution
- Step 1: Write the proportion equation
678,354.12 : 936,226.08 = 406,432.80 : x - Step 2: Convert to fraction form
678,354.12/936,226.08 = 406,432.80/x - Step 3: Cross multiply
678,354.12x = 936,226.08 × 406,432.80 - Step 4: Simplify right side
678,354.12x = 380,512,987,127.42 - Step 5: Solve for x
x = 380,512,987,127.42/678,354.12 - Step 6: Final answer
x = 560,935.62
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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.