Finding the Fourth Proportional to 309,327.12, 426,905.64 and 173,383.20
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Solution
The fourth proportional to 309,327.12, 426,905.64 and 173,383.20 is: 239,287.99
Step by Step Solution
- Step 1: Write the proportion equation
309,327.12 : 426,905.64 = 173,383.20 : x - Step 2: Convert to fraction form
309,327.12/426,905.64 = 173,383.20/x - Step 3: Cross multiply
309,327.12x = 426,905.64 × 173,383.20 - Step 4: Simplify right side
309,327.12x = 74,018,265,961.25 - Step 5: Solve for x
x = 74,018,265,961.25/309,327.12 - Step 6: Final answer
x = 239,287.99
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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.