Finding the Fourth Proportional to 305,125,457.06, 421,087,522.12 and 172,969,021.94
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Solution
The fourth proportional to 305,125,457.06, 421,087,522.12 and 172,969,021.94 is: 238,705,408.43
Step by Step Solution
- Step 1: Write the proportion equation
305,125,457.06 : 421,087,522.12 = 172,969,021.94 : x - Step 2: Convert to fraction form
305,125,457.06/421,087,522.12 = 172,969,021.94/x - Step 3: Cross multiply
305,125,457.06x = 421,087,522.12 × 172,969,021.94 - Step 4: Simplify right side
305,125,457.06x = 72,835,096,849,696,656 - Step 5: Solve for x
x = 72,835,096,849,696,656/305,125,457.06 - Step 6: Final answer
x = 238,705,408.43
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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.