Finding the Fourth Proportional to 1,991,606,251.23, 2,987,368,356.22 and 663,730,705.91
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Solution
The fourth proportional to 1,991,606,251.23, 2,987,368,356.22 and 663,730,705.91 is: 995,582,388.17
Step by Step Solution
- Step 1: Write the proportion equation
1,991,606,251.23 : 2,987,368,356.22 = 663,730,705.91 : x - Step 2: Convert to fraction form
1,991,606,251.23/2,987,368,356.22 = 663,730,705.91/x - Step 3: Cross multiply
1,991,606,251.23x = 2,987,368,356.22 × 663,730,705.91 - Step 4: Simplify right side
1,991,606,251.23x = 1,982,808,107,892,780,032 - Step 5: Solve for x
x = 1,982,808,107,892,780,032/1,991,606,251.23 - Step 6: Final answer
x = 995,582,388.17
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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.