Finding the Fourth Proportional to 257,115.84, 385,009.20 and 177,399.60
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Solution
The fourth proportional to 257,115.84, 385,009.20 and 177,399.60 is: 265,640.88
Step by Step Solution
- Step 1: Write the proportion equation
257,115.84 : 385,009.20 = 177,399.60 : x - Step 2: Convert to fraction form
257,115.84/385,009.20 = 177,399.60/x - Step 3: Cross multiply
257,115.84x = 385,009.20 × 177,399.60 - Step 4: Simplify right side
257,115.84x = 68,300,478,076.32 - Step 5: Solve for x
x = 68,300,478,076.32/257,115.84 - Step 6: Final answer
x = 265,640.88
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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.