Finding the Fourth Proportional to 644,318.69, 889,161.84 and 357,838.79
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Solution
The fourth proportional to 644,318.69, 889,161.84 and 357,838.79 is: 493,818.66
Step by Step Solution
- Step 1: Write the proportion equation
644,318.69 : 889,161.84 = 357,838.79 : x - Step 2: Convert to fraction form
644,318.69/889,161.84 = 357,838.79/x - Step 3: Cross multiply
644,318.69x = 889,161.84 × 357,838.79 - Step 4: Simplify right side
644,318.69x = 318,176,592,493.96 - Step 5: Solve for x
x = 318,176,592,493.96/644,318.69 - Step 6: Final answer
x = 493,818.66
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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.