Finding the Fourth Proportional to 1,206,451,979.20, 1,809,677,968.80 and 854,425,460.80
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Solution
The fourth proportional to 1,206,451,979.20, 1,809,677,968.80 and 854,425,460.80 is: 1,281,638,191.20
Step by Step Solution
- Step 1: Write the proportion equation
1,206,451,979.20 : 1,809,677,968.80 = 854,425,460.80 : x - Step 2: Convert to fraction form
1,206,451,979.20/1,809,677,968.80 = 854,425,460.80/x - Step 3: Cross multiply
1,206,451,979.20x = 1,809,677,968.80 × 854,425,460.80 - Step 4: Simplify right side
1,206,451,979.20x = 1,546,234,932,391,547,904 - Step 5: Solve for x
x = 1,546,234,932,391,547,904/1,206,451,979.20 - Step 6: Final answer
x = 1,281,638,191.20
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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.