Finding the Fourth Proportional to 391,489.70, 586,636.76 and 279,405.95
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Solution
The fourth proportional to 391,489.70, 586,636.76 and 279,405.95 is: 418,682.28
Step by Step Solution
- Step 1: Write the proportion equation
391,489.70 : 586,636.76 = 279,405.95 : x - Step 2: Convert to fraction form
391,489.70/586,636.76 = 279,405.95/x - Step 3: Cross multiply
391,489.70x = 586,636.76 × 279,405.95 - Step 4: Simplify right side
391,489.70x = 163,909,796,902.51 - Step 5: Solve for x
x = 163,909,796,902.51/391,489.70 - Step 6: Final answer
x = 418,682.28
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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.