Finding the Fourth Proportional to 397,423,779.60, 548,444,841.14 and 221,207,981.52
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Solution
The fourth proportional to 397,423,779.60, 548,444,841.14 and 221,207,981.52 is: 305,267,028.58
Step by Step Solution
- Step 1: Write the proportion equation
397,423,779.60 : 548,444,841.14 = 221,207,981.52 : x - Step 2: Convert to fraction form
397,423,779.60/548,444,841.14 = 221,207,981.52/x - Step 3: Cross multiply
397,423,779.60x = 548,444,841.14 × 221,207,981.52 - Step 4: Simplify right side
397,423,779.60x = 121,320,376,283,636,464 - Step 5: Solve for x
x = 121,320,376,283,636,464/397,423,779.60 - Step 6: Final answer
x = 305,267,028.58
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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.