Finding the Fourth Proportional to 643,787.76, 888,414.84 and 357,311.28
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Solution
The fourth proportional to 643,787.76, 888,414.84 and 357,311.28 is: 493,082.76
Step by Step Solution
- Step 1: Write the proportion equation
643,787.76 : 888,414.84 = 357,311.28 : x - Step 2: Convert to fraction form
643,787.76/888,414.84 = 357,311.28/x - Step 3: Cross multiply
643,787.76x = 888,414.84 × 357,311.28 - Step 4: Simplify right side
643,787.76x = 317,440,643,651.40 - Step 5: Solve for x
x = 317,440,643,651.40/643,787.76 - Step 6: Final answer
x = 493,082.76
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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.