Finding the Fourth Proportional to 393,984,143.60, 590,976,215.40 and 248,865,321.20
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Solution
The fourth proportional to 393,984,143.60, 590,976,215.40 and 248,865,321.20 is: 373,297,981.80
Step by Step Solution
- Step 1: Write the proportion equation
393,984,143.60 : 590,976,215.40 = 248,865,321.20 : x - Step 2: Convert to fraction form
393,984,143.60/590,976,215.40 = 248,865,321.20/x - Step 3: Cross multiply
393,984,143.60x = 590,976,215.40 × 248,865,321.20 - Step 4: Simplify right side
393,984,143.60x = 147,073,485,667,081,376 - Step 5: Solve for x
x = 147,073,485,667,081,376/393,984,143.60 - Step 6: Final answer
x = 373,297,981.80
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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.