Finding the Fourth Proportional to 389,957.92, 538,151.76 and 239,138.08
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Solution
The fourth proportional to 389,957.92, 538,151.76 and 239,138.08 is: 330,016.58
Step by Step Solution
- Step 1: Write the proportion equation
389,957.92 : 538,151.76 = 239,138.08 : x - Step 2: Convert to fraction form
389,957.92/538,151.76 = 239,138.08/x - Step 3: Cross multiply
389,957.92x = 538,151.76 × 239,138.08 - Step 4: Simplify right side
389,957.92x = 128,692,578,635.02 - Step 5: Solve for x
x = 128,692,578,635.02/389,957.92 - Step 6: Final answer
x = 330,016.58
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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.