Finding the Fourth Proportional to 839,814,415.80, 1,259,721,623.70 and 809,203,414.20
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Solution
The fourth proportional to 839,814,415.80, 1,259,721,623.70 and 809,203,414.20 is: 1,213,805,121.30
Step by Step Solution
- Step 1: Write the proportion equation
839,814,415.80 : 1,259,721,623.70 = 809,203,414.20 : x - Step 2: Convert to fraction form
839,814,415.80/1,259,721,623.70 = 809,203,414.20/x - Step 3: Cross multiply
839,814,415.80x = 1,259,721,623.70 × 809,203,414.20 - Step 4: Simplify right side
839,814,415.80x = 1,019,371,038,839,607,680 - Step 5: Solve for x
x = 1,019,371,038,839,607,680/839,814,415.80 - Step 6: Final answer
x = 1,213,805,121.30
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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.