Finding the Fourth Proportional to 389,644,235.10, 537,708,874.53 and 211,028,131.62
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Solution
The fourth proportional to 389,644,235.10, 537,708,874.53 and 211,028,131.62 is: 291,218,729.61
Step by Step Solution
- Step 1: Write the proportion equation
389,644,235.10 : 537,708,874.53 = 211,028,131.62 : x - Step 2: Convert to fraction form
389,644,235.10/537,708,874.53 = 211,028,131.62/x - Step 3: Cross multiply
389,644,235.10x = 537,708,874.53 × 211,028,131.62 - Step 4: Simplify right side
389,644,235.10x = 113,471,699,145,147,888 - Step 5: Solve for x
x = 113,471,699,145,147,888/389,644,235.10 - Step 6: Final answer
x = 291,218,729.61
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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.