Finding the Fourth Proportional to 459,754.80, 689,658.12 and 139,917.08
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Solution
The fourth proportional to 459,754.80, 689,658.12 and 139,917.08 is: 209,883.50
Step by Step Solution
- Step 1: Write the proportion equation
459,754.80 : 689,658.12 = 139,917.08 : x - Step 2: Convert to fraction form
459,754.80/689,658.12 = 139,917.08/x - Step 3: Cross multiply
459,754.80x = 689,658.12 × 139,917.08 - Step 4: Simplify right side
459,754.80x = 96,494,946,900.40 - Step 5: Solve for x
x = 96,494,946,900.40/459,754.80 - Step 6: Final answer
x = 209,883.50
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1.5x scale
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.