Finding the Fourth Proportional to 388,337,069.54, 535,905,135.34 and 209,720,942.84
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Solution
The fourth proportional to 388,337,069.54, 535,905,135.34 and 209,720,942.84 is: 289,414,889.98
Step by Step Solution
- Step 1: Write the proportion equation
388,337,069.54 : 535,905,135.34 = 209,720,942.84 : x - Step 2: Convert to fraction form
388,337,069.54/535,905,135.34 = 209,720,942.84/x - Step 3: Cross multiply
388,337,069.54x = 535,905,135.34 × 209,720,942.84 - Step 4: Simplify right side
388,337,069.54x = 112,390,530,256,302,608 - Step 5: Solve for x
x = 112,390,530,256,302,608/388,337,069.54 - Step 6: Final answer
x = 289,414,889.98
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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.