Finding the Fourth Proportional to 319,006.48, 439,921.92 and 209,915.68
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Solution
The fourth proportional to 319,006.48, 439,921.92 and 209,915.68 is: 289,481.61
Step by Step Solution
- Step 1: Write the proportion equation
319,006.48 : 439,921.92 = 209,915.68 : x - Step 2: Convert to fraction form
319,006.48/439,921.92 = 209,915.68/x - Step 3: Cross multiply
319,006.48x = 439,921.92 × 209,915.68 - Step 4: Simplify right side
319,006.48x = 92,346,508,983.71 - Step 5: Solve for x
x = 92,346,508,983.71/319,006.48 - Step 6: Final answer
x = 289,481.61
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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.