Finding the Fourth Proportional to 291,226,439.80, 436,839,659.70 and 138,171,431.80
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Solution
The fourth proportional to 291,226,439.80, 436,839,659.70 and 138,171,431.80 is: 207,257,147.70
Step by Step Solution
- Step 1: Write the proportion equation
291,226,439.80 : 436,839,659.70 = 138,171,431.80 : x - Step 2: Convert to fraction form
291,226,439.80/436,839,659.70 = 138,171,431.80/x - Step 3: Cross multiply
291,226,439.80x = 436,839,659.70 × 138,171,431.80 - Step 4: Simplify right side
291,226,439.80x = 60,358,761,247,773,760 - Step 5: Solve for x
x = 60,358,761,247,773,760/291,226,439.80 - Step 6: Final answer
x = 207,257,147.70
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.