Finding the Fourth Proportional to 397,376,421.12, 548,369,782.79 and 218,758,857.71
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Solution
The fourth proportional to 397,376,421.12, 548,369,782.79 and 218,758,857.71 is: 301,881,895.62
Step by Step Solution
- Step 1: Write the proportion equation
397,376,421.12 : 548,369,782.79 = 218,758,857.71 : x - Step 2: Convert to fraction form
397,376,421.12/548,369,782.79 = 218,758,857.71/x - Step 3: Cross multiply
397,376,421.12x = 548,369,782.79 × 218,758,857.71 - Step 4: Simplify right side
397,376,421.12x = 119,960,747,281,985,568 - Step 5: Solve for x
x = 119,960,747,281,985,568/397,376,421.12 - Step 6: Final answer
x = 301,881,895.62
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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.