Finding the Fourth Proportional to 388,337,091.28, 535,905,165.36 and 209,720,964.58
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Solution
The fourth proportional to 388,337,091.28, 535,905,165.36 and 209,720,964.58 is: 289,414,919.99
Step by Step Solution
- Step 1: Write the proportion equation
388,337,091.28 : 535,905,165.36 = 209,720,964.58 : x - Step 2: Convert to fraction form
388,337,091.28/535,905,165.36 = 209,720,964.58/x - Step 3: Cross multiply
388,337,091.28x = 535,905,165.36 × 209,720,964.58 - Step 4: Simplify right side
388,337,091.28x = 112,390,548,202,703,616 - Step 5: Solve for x
x = 112,390,548,202,703,616/388,337,091.28 - Step 6: Final answer
x = 289,414,919.99
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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.