Finding the Fourth Proportional to 527,721,688.31, 728,255,646.79 and 289,568,436.44
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Solution
The fourth proportional to 527,721,688.31, 728,255,646.79 and 289,568,436.44 is: 399,604,286.95
Step by Step Solution
- Step 1: Write the proportion equation
527,721,688.31 : 728,255,646.79 = 289,568,436.44 : x - Step 2: Convert to fraction form
527,721,688.31/728,255,646.79 = 289,568,436.44/x - Step 3: Cross multiply
527,721,688.31x = 728,255,646.79 × 289,568,436.44 - Step 4: Simplify right side
527,721,688.31x = 210,879,848,965,216,000 - Step 5: Solve for x
x = 210,879,848,965,216,000/527,721,688.31 - Step 6: Final answer
x = 399,604,286.95
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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.