Finding the Fourth Proportional to 388,448,900.82, 536,053,227.21 and 212,233,115.70
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Solution
The fourth proportional to 388,448,900.82, 536,053,227.21 and 212,233,115.70 is: 292,878,281.68
Step by Step Solution
- Step 1: Write the proportion equation
388,448,900.82 : 536,053,227.21 = 212,233,115.70 : x - Step 2: Convert to fraction form
388,448,900.82/536,053,227.21 = 212,233,115.70/x - Step 3: Cross multiply
388,448,900.82x = 536,053,227.21 × 212,233,115.70 - Step 4: Simplify right side
388,448,900.82x = 113,768,246,591,818,304 - Step 5: Solve for x
x = 113,768,246,591,818,304/388,448,900.82 - Step 6: Final answer
x = 292,878,281.68
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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.