Finding the Fourth Proportional to 311,412.81, 429,749.67 and 168,172.84
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Solution
The fourth proportional to 311,412.81, 429,749.67 and 168,172.84 is: 232,078.52
Step by Step Solution
- Step 1: Write the proportion equation
311,412.81 : 429,749.67 = 168,172.84 : x - Step 2: Convert to fraction form
311,412.81/429,749.67 = 168,172.84/x - Step 3: Cross multiply
311,412.81x = 429,749.67 × 168,172.84 - Step 4: Simplify right side
311,412.81x = 72,272,223,660.80 - Step 5: Solve for x
x = 72,272,223,660.80/311,412.81 - Step 6: Final answer
x = 232,078.52
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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.