Finding the Fourth Proportional to 399,861.76, 551,809.18 and 218,574.40
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Solution
The fourth proportional to 399,861.76, 551,809.18 and 218,574.40 is: 301,632.65
Step by Step Solution
- Step 1: Write the proportion equation
399,861.76 : 551,809.18 = 218,574.40 : x - Step 2: Convert to fraction form
399,861.76/551,809.18 = 218,574.40/x - Step 3: Cross multiply
399,861.76x = 551,809.18 × 218,574.40 - Step 4: Simplify right side
399,861.76x = 120,611,360,432.99 - Step 5: Solve for x
x = 120,611,360,432.99/399,861.76 - Step 6: Final answer
x = 301,632.65
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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.