Finding the Fourth Proportional to 285,420.64, 393,921.84 and 172,259.68
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Solution
The fourth proportional to 285,420.64, 393,921.84 and 172,259.68 is: 237,743.32
Step by Step Solution
- Step 1: Write the proportion equation
285,420.64 : 393,921.84 = 172,259.68 : x - Step 2: Convert to fraction form
285,420.64/393,921.84 = 172,259.68/x - Step 3: Cross multiply
285,420.64x = 393,921.84 × 172,259.68 - Step 4: Simplify right side
285,420.64x = 67,856,850,103.41 - Step 5: Solve for x
x = 67,856,850,103.41/285,420.64 - Step 6: Final answer
x = 237,743.32
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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.