Finding the Fourth Proportional to 317,873.79, 438,335.84 and 221,187.20
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Solution
The fourth proportional to 317,873.79, 438,335.84 and 221,187.20 is: 305,008.71
Step by Step Solution
- Step 1: Write the proportion equation
317,873.79 : 438,335.84 = 221,187.20 : x - Step 2: Convert to fraction form
317,873.79/438,335.84 = 221,187.20/x - Step 3: Cross multiply
317,873.79x = 438,335.84 × 221,187.20 - Step 4: Simplify right side
317,873.79x = 96,954,275,470.54 - Step 5: Solve for x
x = 96,954,275,470.54/317,873.79 - Step 6: Final answer
x = 305,008.71
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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.