Finding the Fourth Proportional to 228,830.26, 315,784.88 and 128,228.26
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Solution
The fourth proportional to 228,830.26, 315,784.88 and 128,228.26 is: 176,954.50
Step by Step Solution
- Step 1: Write the proportion equation
228,830.26 : 315,784.88 = 128,228.26 : x - Step 2: Convert to fraction form
228,830.26/315,784.88 = 128,228.26/x - Step 3: Cross multiply
228,830.26x = 315,784.88 × 128,228.26 - Step 4: Simplify right side
228,830.26x = 40,492,543,797.21 - Step 5: Solve for x
x = 40,492,543,797.21/228,830.26 - Step 6: Final answer
x = 176,954.50
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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.