Finding the Fourth Proportional to 261,749,763.20, 392,624,644.80 and 221,438,979.20
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Solution
The fourth proportional to 261,749,763.20, 392,624,644.80 and 221,438,979.20 is: 332,158,468.80
Step by Step Solution
- Step 1: Write the proportion equation
261,749,763.20 : 392,624,644.80 = 221,438,979.20 : x - Step 2: Convert to fraction form
261,749,763.20/392,624,644.80 = 221,438,979.20/x - Step 3: Cross multiply
261,749,763.20x = 392,624,644.80 × 221,438,979.20 - Step 4: Simplify right side
261,749,763.20x = 86,942,400,553,274,592 - Step 5: Solve for x
x = 86,942,400,553,274,592/261,749,763.20 - Step 6: Final answer
x = 332,158,468.80
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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.