Finding the Fourth Proportional to 402,138.63, 555,166.76 and 310,056.80
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Solution
The fourth proportional to 402,138.63, 555,166.76 and 310,056.80 is: 428,044.50
Step by Step Solution
- Step 1: Write the proportion equation
402,138.63 : 555,166.76 = 310,056.80 : x - Step 2: Convert to fraction form
402,138.63/555,166.76 = 310,056.80/x - Step 3: Cross multiply
402,138.63x = 555,166.76 × 310,056.80 - Step 4: Simplify right side
402,138.63x = 172,133,229,071.97 - Step 5: Solve for x
x = 172,133,229,071.97/402,138.63 - Step 6: Final answer
x = 428,044.50
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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.