Finding the Fourth Proportional to 228,948.75, 315,949.28 and 128,346.75
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Solution
The fourth proportional to 228,948.75, 315,949.28 and 128,346.75 is: 177,118.52
Step by Step Solution
- Step 1: Write the proportion equation
228,948.75 : 315,949.28 = 128,346.75 : x - Step 2: Convert to fraction form
228,948.75/315,949.28 = 128,346.75/x - Step 3: Cross multiply
228,948.75x = 315,949.28 × 128,346.75 - Step 4: Simplify right side
228,948.75x = 40,551,062,611.11 - Step 5: Solve for x
x = 40,551,062,611.11/228,948.75 - Step 6: Final answer
x = 177,118.52
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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.