Finding the Fourth Proportional to 643,797.18, 888,481.64 and 357,317.28
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Solution
The fourth proportional to 643,797.18, 888,481.64 and 357,317.28 is: 493,120.90
Step by Step Solution
- Step 1: Write the proportion equation
643,797.18 : 888,481.64 = 357,317.28 : x - Step 2: Convert to fraction form
643,797.18/888,481.64 = 357,317.28/x - Step 3: Cross multiply
643,797.18x = 888,481.64 × 357,317.28 - Step 4: Simplify right side
643,797.18x = 317,469,842,934.74 - Step 5: Solve for x
x = 317,469,842,934.74/643,797.18 - Step 6: Final answer
x = 493,120.90
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1.5x scale
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.