Finding the Fourth Proportional to 386,397.74, 579,953.32 and 278,439.19
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Solution
The fourth proportional to 386,397.74, 579,953.32 and 278,439.19 is: 417,915.82
Step by Step Solution
- Step 1: Write the proportion equation
386,397.74 : 579,953.32 = 278,439.19 : x - Step 2: Convert to fraction form
386,397.74/579,953.32 = 278,439.19/x - Step 3: Cross multiply
386,397.74x = 579,953.32 × 278,439.19 - Step 4: Simplify right side
386,397.74x = 161,481,730,512.63 - Step 5: Solve for x
x = 161,481,730,512.63/386,397.74 - Step 6: Final answer
x = 417,915.82
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.