Finding the Fourth Proportional to 385,478.96, 531,451.28 and 316,315.08
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Solution
The fourth proportional to 385,478.96, 531,451.28 and 316,315.08 is: 436,096.58
Step by Step Solution
- Step 1: Write the proportion equation
385,478.96 : 531,451.28 = 316,315.08 : x - Step 2: Convert to fraction form
385,478.96/531,451.28 = 316,315.08/x - Step 3: Cross multiply
385,478.96x = 531,451.28 × 316,315.08 - Step 4: Simplify right side
385,478.96x = 168,106,052,567.73 - Step 5: Solve for x
x = 168,106,052,567.73/385,478.96 - Step 6: Final answer
x = 436,096.58
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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.