Finding the Fourth Proportional to 285,138.63, 393,489.90 and 157,813.92
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Solution
The fourth proportional to 285,138.63, 393,489.90 and 157,813.92 is: 217,782.43
Step by Step Solution
- Step 1: Write the proportion equation
285,138.63 : 393,489.90 = 157,813.92 : x - Step 2: Convert to fraction form
285,138.63/393,489.90 = 157,813.92/x - Step 3: Cross multiply
285,138.63x = 393,489.90 × 157,813.92 - Step 4: Simplify right side
285,138.63x = 62,098,183,599.41 - Step 5: Solve for x
x = 62,098,183,599.41/285,138.63 - Step 6: Final answer
x = 217,782.43
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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.