Finding the Fourth Proportional to 1,390,809,968.70, 2,086,214,953.05 and 839,811,939.90
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Solution
The fourth proportional to 1,390,809,968.70, 2,086,214,953.05 and 839,811,939.90 is: 1,259,717,909.85
Step by Step Solution
- Step 1: Write the proportion equation
1,390,809,968.70 : 2,086,214,953.05 = 839,811,939.90 : x - Step 2: Convert to fraction form
1,390,809,968.70/2,086,214,953.05 = 839,811,939.90/x - Step 3: Cross multiply
1,390,809,968.70x = 2,086,214,953.05 × 839,811,939.90 - Step 4: Simplify right side
1,390,809,968.70x = 1,752,028,226,769,307,904 - Step 5: Solve for x
x = 1,752,028,226,769,307,904/1,390,809,968.70 - Step 6: Final answer
x = 1,259,717,909.85
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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.