Finding the Fourth Proportional to 385,365,251.79, 531,804,574.10 and 209,153,249.87
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Solution
The fourth proportional to 385,365,251.79, 531,804,574.10 and 209,153,249.87 is: 288,631,770.64
Step by Step Solution
- Step 1: Write the proportion equation
385,365,251.79 : 531,804,574.10 = 209,153,249.87 : x - Step 2: Convert to fraction form
385,365,251.79/531,804,574.10 = 209,153,249.87/x - Step 3: Cross multiply
385,365,251.79x = 531,804,574.10 × 209,153,249.87 - Step 4: Simplify right side
385,365,251.79x = 111,228,654,966,610,096 - Step 5: Solve for x
x = 111,228,654,966,610,096/385,365,251.79 - Step 6: Final answer
x = 288,631,770.64
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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.