Finding the Fourth Proportional to 319,436,394.84, 440,822,516.76 and 172,758,678.84
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Solution
The fourth proportional to 319,436,394.84, 440,822,516.76 and 172,758,678.84 is: 238,407,134.66
Step by Step Solution
- Step 1: Write the proportion equation
319,436,394.84 : 440,822,516.76 = 172,758,678.84 : x - Step 2: Convert to fraction form
319,436,394.84/440,822,516.76 = 172,758,678.84/x - Step 3: Cross multiply
319,436,394.84x = 440,822,516.76 × 172,758,678.84 - Step 4: Simplify right side
319,436,394.84x = 76,155,915,598,381,360 - Step 5: Solve for x
x = 76,155,915,598,381,360/319,436,394.84 - Step 6: Final answer
x = 238,407,134.66
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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.