Finding the Fourth Proportional to 279,077,467.68, 385,126,910.55 and 155,347,374.06
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Solution
The fourth proportional to 279,077,467.68, 385,126,910.55 and 155,347,374.06 is: 214,379,379.07
Step by Step Solution
- Step 1: Write the proportion equation
279,077,467.68 : 385,126,910.55 = 155,347,374.06 : x - Step 2: Convert to fraction form
279,077,467.68/385,126,910.55 = 155,347,374.06/x - Step 3: Cross multiply
279,077,467.68x = 385,126,910.55 × 155,347,374.06 - Step 4: Simplify right side
279,077,467.68x = 59,828,454,233,783,016 - Step 5: Solve for x
x = 59,828,454,233,783,016/279,077,467.68 - Step 6: Final answer
x = 214,379,379.07
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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.