Finding the Fourth Proportional to 428,313.99, 642,355.83 and 128,727.66
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Solution
The fourth proportional to 428,313.99, 642,355.83 and 128,727.66 is: 193,056.88
Step by Step Solution
- Step 1: Write the proportion equation
428,313.99 : 642,355.83 = 128,727.66 : x - Step 2: Convert to fraction form
428,313.99/642,355.83 = 128,727.66/x - Step 3: Cross multiply
428,313.99x = 642,355.83 × 128,727.66 - Step 4: Simplify right side
428,313.99x = 82,688,962,883.26 - Step 5: Solve for x
x = 82,688,962,883.26/428,313.99 - Step 6: Final answer
x = 193,056.88
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.