Finding the Fourth Proportional to 256,905.60, 385,339.20 and 107,107.20
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Solution
The fourth proportional to 256,905.60, 385,339.20 and 107,107.20 is: 160,652.80
Step by Step Solution
- Step 1: Write the proportion equation
256,905.60 : 385,339.20 = 107,107.20 : x - Step 2: Convert to fraction form
256,905.60/385,339.20 = 107,107.20/x - Step 3: Cross multiply
256,905.60x = 385,339.20 × 107,107.20 - Step 4: Simplify right side
256,905.60x = 41,272,602,762.24 - Step 5: Solve for x
x = 41,272,602,762.24/256,905.60 - Step 6: Final answer
x = 160,652.80
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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.